{"id":4340,"date":"2026-08-14T04:23:58","date_gmt":"2026-08-14T04:23:58","guid":{"rendered":"https:\/\/hlconnector.com\/?p=4340"},"modified":"2026-08-17T09:08:03","modified_gmt":"2026-08-17T09:08:03","slug":"d38999-part-number-fully-decoded-shell-type-material-plating-size-arrangement-a-selection-guide","status":"publish","type":"post","link":"https:\/\/hlconnector.com\/en\/d38999-part-number-fully-decoded-shell-type-material-plating-size-arrangement-a-selection-guide\/","title":{"rendered":"D38999 Part Number Fully Decoded: Shell Type + Material\/Plating + Size + Arrangement \u2014 A Selection Guide"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"4340\" class=\"elementor elementor-4340\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a20d84a e-flex e-con-boxed e-con e-parent\" data-id=\"a20d84a\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ee18ab1 elementor-widget elementor-widget-text-editor\" data-id=\"ee18ab1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>D38999 Part Number Fully Decoded: Shell Type + Material\/Plating + Size + Arrangement \u2014 A Selection Guide<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-259737e elementor-align-center elementor-widget elementor-widget-button\" data-id=\"259737e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/hlconnector.com\/en\/mil-dtl-38999-connector\/\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Our Products<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e7f5844 e-flex e-con-boxed e-con e-parent\" data-id=\"e7f5844\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-180fa13 e-con-full e-flex e-con e-child\" data-id=\"180fa13\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1a4f115 elementor-widget elementor-widget-text-editor\" data-id=\"1a4f115\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>A String of Characters, a Set of Codes<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5ef5817 elementor-widget elementor-widget-text-editor\" data-id=\"5ef5817\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"\">When you first see a part number like D38999\/20FA35PN, it may look like nothing more than a meaningless string of letters and numbers. But for engineers and procurement professionals, this string is a\u00a0<\/span><strong><span class=\"\">precise engineering language<\/span><\/strong><span class=\"\">\u00a0\u2014 it tells you the connector&#8217;s\u00a0<\/span><strong><span class=\"\">shell type, material and plating, shell size, insert arrangement, contact type, and polarization keying<\/span><\/strong><span class=\"\">.<\/span><\/p><p><span class=\"\">MIL-DTL-38999 is one of the most widely used standards in military circular connectors<\/span><span class=\"\">. Understanding its part number is equivalent to mastering the &#8220;codebook&#8221; of this standard. This article breaks down every component of the D38999 part number, helping you read all the information from a string of characters.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ef362df elementor-widget elementor-widget-button\" data-id=\"ef362df\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/hlconnector.com\/en\/contact\/\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Choose Our<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-14bbc36 e-con-full e-flex e-con e-child\" data-id=\"14bbc36\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-26a4f3b elementor-widget elementor-widget-image\" data-id=\"26a4f3b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-1024x828.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-1024x828.png 1024w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-300x242.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-768x621.png 768w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-1536x1241.png 1536w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-2048x1655.png 2048w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-15x12.png 15w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-600x485.png 600w\" width=\"1024\" height=\"828\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4044 lazyload\" alt=\"\"  sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><noscript><img decoding=\"async\" width=\"1024\" height=\"828\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-1024x828.png\" class=\"attachment-large size-large wp-image-4044\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-1024x828.png 1024w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-300x242.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-768x621.png 768w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-1536x1241.png 1536w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-2048x1655.png 2048w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-15x12.png 15w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-4-1-600x485.png 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-93e9af5 e-flex e-con-boxed e-con e-parent\" data-id=\"93e9af5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ec9e574 elementor-widget elementor-widget-text-editor\" data-id=\"ec9e574\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Part Number Structure Overview \u2014 A Six-Segment &#8220;Engineering Language&#8221;<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-48075e5 elementor-widget elementor-widget-text-editor\" data-id=\"48075e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"\">A complete D38999 part number consists of\u00a0<\/span><strong><span class=\"\">six core segments<\/span><\/strong><span class=\"\">\u00a0(excluding the prefix)<\/span><span class=\"\">:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a1eab7 elementor-widget elementor-widget-image\" data-id=\"6a1eab7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/388ca6a27c7fcdcceeba6cf39ab94364.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/388ca6a27c7fcdcceeba6cf39ab94364.png 570w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/388ca6a27c7fcdcceeba6cf39ab94364-300x174.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/388ca6a27c7fcdcceeba6cf39ab94364-18x10.png 18w\" width=\"570\" height=\"331\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4342 lazyload\" alt=\"\"  sizes=\"(max-width: 570px) 100vw, 570px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"570\" height=\"331\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/388ca6a27c7fcdcceeba6cf39ab94364.png\" class=\"attachment-large size-large wp-image-4342\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/388ca6a27c7fcdcceeba6cf39ab94364.png 570w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/388ca6a27c7fcdcceeba6cf39ab94364-300x174.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/388ca6a27c7fcdcceeba6cf39ab94364-18x10.png 18w\" sizes=\"(max-width: 570px) 100vw, 570px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1407ec3 elementor-widget elementor-widget-text-editor\" data-id=\"1407ec3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Take\u00a0<\/span><span class=\"\">D38999\/20FA35PN<\/span><span class=\"\">\u00a0as an example<\/span><span class=\"\">:<\/span><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a30b32 elementor-widget elementor-widget-image\" data-id=\"5a30b32\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/37e8b264a7fd97442addc8d0ebc254cd.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/37e8b264a7fd97442addc8d0ebc254cd.png 664w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/37e8b264a7fd97442addc8d0ebc254cd-300x172.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/37e8b264a7fd97442addc8d0ebc254cd-18x10.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/37e8b264a7fd97442addc8d0ebc254cd-600x344.png 600w\" width=\"664\" height=\"381\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4343 lazyload\" alt=\"\"  sizes=\"(max-width: 664px) 100vw, 664px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"664\" height=\"381\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/37e8b264a7fd97442addc8d0ebc254cd.png\" class=\"attachment-large size-large wp-image-4343\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/37e8b264a7fd97442addc8d0ebc254cd.png 664w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/37e8b264a7fd97442addc8d0ebc254cd-300x172.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/37e8b264a7fd97442addc8d0ebc254cd-18x10.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/37e8b264a7fd97442addc8d0ebc254cd-600x344.png 600w\" sizes=\"(max-width: 664px) 100vw, 664px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4f0c80a e-flex e-con-boxed e-con e-parent\" data-id=\"4f0c80a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5c5b690 elementor-widget elementor-widget-text-editor\" data-id=\"5c5b690\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Shell Type \u2014 The Connector&#8217;s &#8220;Identity Tag&#8221;<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-72abdfa elementor-widget elementor-widget-text-editor\" data-id=\"72abdfa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"\">The first segment of the part number (D38999\/XX) defines the connector&#8217;s\u00a0<\/span><strong><span class=\"\">shell type and mounting method<\/span><\/strong><span class=\"\">. Different shell types suit different installation scenarios<\/span><span class=\"\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-21bbb0f elementor-widget elementor-widget-image\" data-id=\"21bbb0f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/8be676e9cf3579915837c33005acdab3.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/8be676e9cf3579915837c33005acdab3.png 808w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/8be676e9cf3579915837c33005acdab3-300x141.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/8be676e9cf3579915837c33005acdab3-768x362.png 768w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/8be676e9cf3579915837c33005acdab3-18x8.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/8be676e9cf3579915837c33005acdab3-600x283.png 600w\" width=\"808\" height=\"381\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4344 lazyload\" alt=\"\"  sizes=\"(max-width: 808px) 100vw, 808px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"808\" height=\"381\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/8be676e9cf3579915837c33005acdab3.png\" class=\"attachment-large size-large wp-image-4344\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/8be676e9cf3579915837c33005acdab3.png 808w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/8be676e9cf3579915837c33005acdab3-300x141.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/8be676e9cf3579915837c33005acdab3-768x362.png 768w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/8be676e9cf3579915837c33005acdab3-18x8.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/8be676e9cf3579915837c33005acdab3-600x283.png 600w\" sizes=\"(max-width: 808px) 100vw, 808px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a490f1 elementor-widget elementor-widget-text-editor\" data-id=\"5a490f1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Selection Tip<\/span><\/strong><span class=\"\">: For panel mounting, choose \/20 or \/24; for hermetic sealing in space applications, choose \/21, \/23, \/25, or \/27; for cable-end connections, choose \/26<\/span><span class=\"\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e9dda92 e-flex e-con-boxed e-con e-parent\" data-id=\"e9dda92\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6619be4 elementor-widget elementor-widget-text-editor\" data-id=\"6619be4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Material and Plating \u2014 The &#8220;Armor&#8221; That Determines Environmental Adaptability<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6044d1b elementor-widget elementor-widget-text-editor\" data-id=\"6044d1b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"\">The second segment (one letter) defines the shell\u00a0<\/span><strong><span class=\"\">material and surface plating<\/span><\/strong><span class=\"\">. This choice directly affects the connector&#8217;s\u00a0<\/span><strong><span class=\"\">corrosion resistance, operating temperature, and conductivity<\/span><\/strong><span class=\"\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c52c892 elementor-widget elementor-widget-image\" data-id=\"c52c892\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9e8337768414c75706b2bf55e559961a.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9e8337768414c75706b2bf55e559961a.png 819w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9e8337768414c75706b2bf55e559961a-300x159.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9e8337768414c75706b2bf55e559961a-768x408.png 768w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9e8337768414c75706b2bf55e559961a-18x10.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9e8337768414c75706b2bf55e559961a-600x319.png 600w\" width=\"819\" height=\"435\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4345 lazyload\" alt=\"\"  sizes=\"(max-width: 819px) 100vw, 819px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"819\" height=\"435\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9e8337768414c75706b2bf55e559961a.png\" class=\"attachment-large size-large wp-image-4345\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9e8337768414c75706b2bf55e559961a.png 819w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9e8337768414c75706b2bf55e559961a-300x159.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9e8337768414c75706b2bf55e559961a-768x408.png 768w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9e8337768414c75706b2bf55e559961a-18x10.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9e8337768414c75706b2bf55e559961a-600x319.png 600w\" sizes=\"(max-width: 819px) 100vw, 819px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7bc9f64 e-flex e-con-boxed e-con e-parent\" data-id=\"7bc9f64\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-6d4a7cf e-con-full e-flex e-con e-child\" data-id=\"6d4a7cf\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3f35ffc elementor-widget elementor-widget-text-editor\" data-id=\"3f35ffc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Selection Tip:<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2deab67 elementor-widget elementor-widget-text-editor\" data-id=\"2deab67\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><p class=\"ds-markdown-paragraph\"><span class=\"\">Export to Europe \u2192 Avoid W\/J (contain cadmium, not RoHS compliant); choose F, Z, or other RoHS-compliant platings<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><span class=\"\">Space applications \u2192 Choose G (space-grade electroless nickel) or hermetic classes<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><span class=\"\">Highest corrosion resistance \u2192 J or M (2,000-hour salt spray)<\/span><\/p><\/li><li><p class=\"ds-markdown-paragraph\"><span class=\"\">Firewall\/high-safety applications \u2192 K (stainless steel passivated)<\/span><\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2ff6e19 elementor-widget elementor-widget-text-editor\" data-id=\"2ff6e19\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Important<\/span><\/strong><span class=\"\">: Although olive drab cadmium (W\/J) offers excellent corrosion resistance, it\u00a0<\/span><strong><span class=\"\">contains the toxic heavy metal cadmium and is not RoHS compliant<\/span><\/strong><span class=\"\">\u00a0\u2014 special attention is required for export to European markets<\/span><span class=\"\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8365314 e-flex e-con-boxed e-con e-parent\" data-id=\"8365314\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-79a4205 elementor-widget elementor-widget-text-editor\" data-id=\"79a4205\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Shell Size \u2014 The Connector&#8217;s &#8220;Size&#8221;<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6925d55 elementor-widget elementor-widget-text-editor\" data-id=\"6925d55\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"\">The third segment (one letter) defines the shell&#8217;s\u00a0<\/span><strong><span class=\"\">physical size<\/span><\/strong><span class=\"\">. The shell size determines the connector&#8217;s\u00a0<\/span><strong><span class=\"\">diameter<\/span><\/strong><span class=\"\">\u00a0and\u00a0<\/span><strong><span class=\"\">maximum number of contacts it can accommodate<\/span><\/strong><span class=\"\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0269d89 elementor-widget elementor-widget-image\" data-id=\"0269d89\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/70802b57836557cbd7e71776005f6bda.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/70802b57836557cbd7e71776005f6bda.png 549w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/70802b57836557cbd7e71776005f6bda-300x260.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/70802b57836557cbd7e71776005f6bda-14x12.png 14w\" width=\"549\" height=\"476\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4346 lazyload\" alt=\"\"  sizes=\"(max-width: 549px) 100vw, 549px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"549\" height=\"476\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/70802b57836557cbd7e71776005f6bda.png\" class=\"attachment-large size-large wp-image-4346\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/70802b57836557cbd7e71776005f6bda.png 549w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/70802b57836557cbd7e71776005f6bda-300x260.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/70802b57836557cbd7e71776005f6bda-14x12.png 14w\" sizes=\"(max-width: 549px) 100vw, 549px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-594a240 elementor-widget elementor-widget-text-editor\" data-id=\"594a240\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"\">MIL-DTL-38999 shell sizes cover\u00a0<\/span><strong><span class=\"\">9 standard sizes from 09 to 25<\/span><\/strong><span class=\"\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cbfdb2e e-con-full e-flex e-con e-child\" data-id=\"cbfdb2e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-730a3d1 elementor-widget elementor-widget-text-editor\" data-id=\"730a3d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Selection Tip<\/span><\/strong><span class=\"\">: Larger shell sizes accommodate more contacts but also consume more panel space and add weight.\u00a0<\/span><strong><span class=\"\">Choose the smallest shell size that meets your contact count requirements<\/span><\/strong><span class=\"\">\u00a0to optimize SWaP (Size, Weight, and Power).<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f41a944 e-flex e-con-boxed e-con e-parent\" data-id=\"f41a944\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f20b3dd elementor-widget elementor-widget-text-editor\" data-id=\"f20b3dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Insert Arrangement \u2014 The Connector&#8217;s &#8220;Internal Map&#8221;<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d529e40 elementor-widget elementor-widget-text-editor\" data-id=\"d529e40\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"\">The fourth segment (1-3 digits) defines the\u00a0<\/span><strong><span class=\"\">arrangement<\/span><\/strong><span class=\"\">\u00a0of contacts inside the connector. The arrangement number follows the\u00a0<\/span><strong><span class=\"\">MIL-STD-1560<\/span><\/strong><span class=\"\">\u00a0standard<\/span><span class=\"\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-51ff303 e-con-full e-flex e-con e-child\" data-id=\"51ff303\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3ece986 elementor-widget elementor-widget-text-editor\" data-id=\"3ece986\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">The arrangement number tells you three things<\/span><span class=\"\">:<\/span><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-87e2dae elementor-widget elementor-widget-text-editor\" data-id=\"87e2dae\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ol><li>Total number of contacts<\/li><li>Number of contacts of each size<\/li><li>Physical positions of contacts<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-94952e2 elementor-widget elementor-widget-text-editor\" data-id=\"94952e2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Common Arrangement Examples:<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8af27c1 elementor-widget elementor-widget-image\" data-id=\"8af27c1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/396897a001f7eabae5075699fda5c3b3.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/396897a001f7eabae5075699fda5c3b3.png 641w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/396897a001f7eabae5075699fda5c3b3-300x86.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/396897a001f7eabae5075699fda5c3b3-18x5.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/396897a001f7eabae5075699fda5c3b3-600x172.png 600w\" width=\"641\" height=\"184\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4347 lazyload\" alt=\"\"  sizes=\"(max-width: 641px) 100vw, 641px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"641\" height=\"184\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/396897a001f7eabae5075699fda5c3b3.png\" class=\"attachment-large size-large wp-image-4347\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/396897a001f7eabae5075699fda5c3b3.png 641w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/396897a001f7eabae5075699fda5c3b3-300x86.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/396897a001f7eabae5075699fda5c3b3-18x5.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/396897a001f7eabae5075699fda5c3b3-600x172.png 600w\" sizes=\"(max-width: 641px) 100vw, 641px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c4bea81 elementor-widget elementor-widget-text-editor\" data-id=\"c4bea81\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"\">Different shell sizes support different arrangement numbers<\/span><span class=\"\">. For example, shell size D (15) supports 6 different arrangement options<\/span><span class=\"\">. When selecting, first determine the required contact count and contact sizes, then find the supported arrangement numbers for the corresponding shell size.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0d19d46 elementor-widget elementor-widget-text-editor\" data-id=\"0d19d46\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Contact Sizes and Current Ratings:<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ce22fcc elementor-widget elementor-widget-image\" data-id=\"ce22fcc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9329b3c951e710d523c98cbd950bd36c.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9329b3c951e710d523c98cbd950bd36c.png 583w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9329b3c951e710d523c98cbd950bd36c-300x145.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9329b3c951e710d523c98cbd950bd36c-18x9.png 18w\" width=\"583\" height=\"281\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4348 lazyload\" alt=\"\"  sizes=\"(max-width: 583px) 100vw, 583px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"583\" height=\"281\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9329b3c951e710d523c98cbd950bd36c.png\" class=\"attachment-large size-large wp-image-4348\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9329b3c951e710d523c98cbd950bd36c.png 583w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9329b3c951e710d523c98cbd950bd36c-300x145.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/9329b3c951e710d523c98cbd950bd36c-18x9.png 18w\" sizes=\"(max-width: 583px) 100vw, 583px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af26123 elementor-widget elementor-widget-text-editor\" data-id=\"af26123\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"\">38999 connectors support up to\u00a0<\/span><strong><span class=\"\">128 contacts<\/span><\/strong><span class=\"\">, with contact types including signal, power, coaxial, twinax, quadrax, and fiber optic.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-320276d e-flex e-con-boxed e-con e-parent\" data-id=\"320276d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8e65294 elementor-widget elementor-widget-text-editor\" data-id=\"8e65294\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Contact Type and Polarization Keying \u2014 The Final &#8220;Puzzle Pieces&#8221;<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-94ab93e elementor-widget elementor-widget-text-editor\" data-id=\"94ab93e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Contact Type \u2014 Segment 5 (1 letter)<\/span><\/strong><span class=\"\">\u00a0:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-598e006 elementor-widget elementor-widget-image\" data-id=\"598e006\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/d7e099218ecf22284d322eec4c4ca4bc.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/d7e099218ecf22284d322eec4c4ca4bc.png 580w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/d7e099218ecf22284d322eec4c4ca4bc-300x171.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/d7e099218ecf22284d322eec4c4ca4bc-18x10.png 18w\" width=\"580\" height=\"331\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4349 lazyload\" alt=\"\"  sizes=\"(max-width: 580px) 100vw, 580px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"580\" height=\"331\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/d7e099218ecf22284d322eec4c4ca4bc.png\" class=\"attachment-large size-large wp-image-4349\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/d7e099218ecf22284d322eec4c4ca4bc.png 580w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/d7e099218ecf22284d322eec4c4ca4bc-300x171.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/d7e099218ecf22284d322eec4c4ca4bc-18x10.png 18w\" sizes=\"(max-width: 580px) 100vw, 580px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-031d1d8 elementor-widget elementor-widget-text-editor\" data-id=\"031d1d8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Polarization\/Keying \u2014 Segment 6 (1 letter)<\/span><\/strong><span class=\"\">\u00a0:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e607d36 elementor-widget elementor-widget-text-editor\" data-id=\"e607d36\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"\">Polarization keying determines the\u00a0<\/span><strong><span class=\"\">rotational alignment<\/span><\/strong><span class=\"\">\u00a0of the connector, preventing misinsertion between different connectors with the same shell size and arrangement<\/span><span class=\"\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-91dc4b0 elementor-widget elementor-widget-image\" data-id=\"91dc4b0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/31c11d63368c1f14efc1f1e349cac8ee.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/31c11d63368c1f14efc1f1e349cac8ee.png 339w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/31c11d63368c1f14efc1f1e349cac8ee-300x296.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/31c11d63368c1f14efc1f1e349cac8ee-12x12.png 12w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/31c11d63368c1f14efc1f1e349cac8ee-100x100.png 100w\" width=\"339\" height=\"335\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4350 lazyload\" alt=\"\"  sizes=\"(max-width: 339px) 100vw, 339px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"339\" height=\"335\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/31c11d63368c1f14efc1f1e349cac8ee.png\" class=\"attachment-large size-large wp-image-4350\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/31c11d63368c1f14efc1f1e349cac8ee.png 339w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/31c11d63368c1f14efc1f1e349cac8ee-300x296.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/31c11d63368c1f14efc1f1e349cac8ee-12x12.png 12w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/31c11d63368c1f14efc1f1e349cac8ee-100x100.png 100w\" sizes=\"(max-width: 339px) 100vw, 339px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-44e7c0a elementor-widget elementor-widget-text-editor\" data-id=\"44e7c0a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Key Rule<\/span><\/strong><span class=\"\">: The\u00a0<\/span><strong><span class=\"\">shell type, shell size, arrangement number, and polarization keying<\/span><\/strong><span class=\"\">\u00a0of the plug and receptacle must match exactly for proper mating<\/span><span class=\"\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ef323e5 e-flex e-con-boxed e-con e-parent\" data-id=\"ef323e5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-16fe1cc elementor-widget elementor-widget-text-editor\" data-id=\"16fe1cc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Real-World Decoding \u2014 Three Part Number Examples<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6780648 elementor-widget elementor-widget-text-editor\" data-id=\"6780648\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Example 1: D38999\/20FA35PN<\/span><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e57a26d elementor-widget elementor-widget-image\" data-id=\"e57a26d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/be3dac9d22162bde05cae0c47ecd5d57.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/be3dac9d22162bde05cae0c47ecd5d57.png 615w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/be3dac9d22162bde05cae0c47ecd5d57-300x161.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/be3dac9d22162bde05cae0c47ecd5d57-18x10.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/be3dac9d22162bde05cae0c47ecd5d57-600x323.png 600w\" width=\"615\" height=\"331\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4351 lazyload\" alt=\"\"  sizes=\"(max-width: 615px) 100vw, 615px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"615\" height=\"331\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/be3dac9d22162bde05cae0c47ecd5d57.png\" class=\"attachment-large size-large wp-image-4351\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/be3dac9d22162bde05cae0c47ecd5d57.png 615w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/be3dac9d22162bde05cae0c47ecd5d57-300x161.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/be3dac9d22162bde05cae0c47ecd5d57-18x10.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/be3dac9d22162bde05cae0c47ecd5d57-600x323.png 600w\" sizes=\"(max-width: 615px) 100vw, 615px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0ac58e5 elementor-widget elementor-widget-text-editor\" data-id=\"0ac58e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Full Interpretation<\/span><\/strong><span class=\"\">: MIL-DTL-38999 receptacle with aluminum electroless nickel shell, wall mount flange, shell size 09, 35-contact pin arrangement, normal keying.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c2d7622 elementor-widget elementor-widget-text-editor\" data-id=\"c2d7622\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Example 2: D38999\/26WJ35SN<\/span><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8b2661c elementor-widget elementor-widget-image\" data-id=\"8b2661c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/af5c761da0b8ebb658091ab363e7ad69.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/af5c761da0b8ebb658091ab363e7ad69.png 634w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/af5c761da0b8ebb658091ab363e7ad69-300x158.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/af5c761da0b8ebb658091ab363e7ad69-18x9.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/af5c761da0b8ebb658091ab363e7ad69-600x316.png 600w\" width=\"634\" height=\"334\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4352 lazyload\" alt=\"\"  sizes=\"(max-width: 634px) 100vw, 634px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"634\" height=\"334\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/af5c761da0b8ebb658091ab363e7ad69.png\" class=\"attachment-large size-large wp-image-4352\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/af5c761da0b8ebb658091ab363e7ad69.png 634w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/af5c761da0b8ebb658091ab363e7ad69-300x158.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/af5c761da0b8ebb658091ab363e7ad69-18x9.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/af5c761da0b8ebb658091ab363e7ad69-600x316.png 600w\" sizes=\"(max-width: 634px) 100vw, 634px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-40d985e elementor-widget elementor-widget-text-editor\" data-id=\"40d985e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Full Interpretation<\/span><\/strong><span class=\"\">: MIL-DTL-38999 plug with aluminum olive drab cadmium shell, straight plug with EMI grounding fingers, shell size 25, 35-contact socket arrangement, normal keying.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-087b74a elementor-widget elementor-widget-text-editor\" data-id=\"087b74a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Example 3: D38999\/24ZE99PC<\/span><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6c4fdd8 elementor-widget elementor-widget-image\" data-id=\"6c4fdd8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/2e2eee4f67caf8fc9e962fa30e66febc.png\" data-srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/2e2eee4f67caf8fc9e962fa30e66febc.png 605w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/2e2eee4f67caf8fc9e962fa30e66febc-300x166.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/2e2eee4f67caf8fc9e962fa30e66febc-18x10.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/2e2eee4f67caf8fc9e962fa30e66febc-600x332.png 600w\" width=\"605\" height=\"335\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-large size-large wp-image-4353 lazyload\" alt=\"\"  sizes=\"(max-width: 605px) 100vw, 605px\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"605\" height=\"335\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/2e2eee4f67caf8fc9e962fa30e66febc.png\" class=\"attachment-large size-large wp-image-4353\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/2e2eee4f67caf8fc9e962fa30e66febc.png 605w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/2e2eee4f67caf8fc9e962fa30e66febc-300x166.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/2e2eee4f67caf8fc9e962fa30e66febc-18x10.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/08\/2e2eee4f67caf8fc9e962fa30e66febc-600x332.png 600w\" sizes=\"(max-width: 605px) 100vw, 605px\"><\/noscript>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-76efd90 elementor-widget elementor-widget-text-editor\" data-id=\"76efd90\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><span class=\"\">Full Interpretation<\/span><\/strong><span class=\"\">: MIL-DTL-38999 receptacle with aluminum black zinc nickel plating (RoHS compliant), jam nut mount, shell size 17, 99-contact pin arrangement, keying position C.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1cbf8a2 e-flex e-con-boxed e-con e-parent\" data-id=\"1cbf8a2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-ebe210b e-con-full e-flex e-con e-child\" data-id=\"ebe210b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d47e9e5 elementor-widget elementor-widget-text-editor\" data-id=\"d47e9e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"\">The D38999 part number is not a random string of characters \u2014 it is a\u00a0<\/span><strong><span class=\"\">precise engineering coding system<\/span><\/strong><span class=\"\">. Every letter and every number tells you critical information about the connector \u2014 its shape, material, size, arrangement, and polarity.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-435626c e-con-full e-flex e-con e-child\" data-id=\"435626c\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9a69106 e-con-full e-flex e-con e-child\" data-id=\"9a69106\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b6f3571 elementor-widget elementor-widget-text-editor\" data-id=\"b6f3571\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span class=\"\">Master this &#8220;codebook,&#8221; and you can read all the information from a string of characters,\u00a0<\/span><strong><span class=\"\">precisely locating<\/span><\/strong><span class=\"\">\u00a0the connector configuration you need. Whether you are an engineer, procurement professional, or maintenance technician, understanding the D38999 part number is an essential skill.<\/span><\/p><ul><li><strong><span class=\"\">Full shell type coverage<\/span><\/strong><span class=\"\">\u00a0\u2013 \/20 Wall Mount \/24 Jam Nut \/26 Straight Plug \/21\/23\/25\/27 Hermetic types<\/span><\/li><li><strong><span class=\"\">Full shell size coverage 09\u201325 (A\u2013J)<\/span><\/strong><span class=\"\">\u00a0\u2013 From small sensors to large systems<\/span><\/li><li><strong><span class=\"\">Insert arrangements<\/span><\/strong><span class=\"\">\u00a0\u2013 Per MIL-STD-1560, covering common arrangements<\/span><\/li><li><strong><span class=\"\">Contact types<\/span><\/strong><span class=\"\">\u00a0\u2013 P\/S (crimp\/solder) \/ PL\/SL\/PC\/SC (PCB mount)<\/span><\/li><li><strong><span class=\"\">Polarization keying<\/span><\/strong><span class=\"\">\u00a0\u2013 N \/ A \/ B \/ C \/ D \/ E, misinsertion prevention assured<\/span><\/li><li><strong><span class=\"\">Operating temperature -65\u00b0C to +200\u00b0C<\/span><\/strong><span class=\"\">\u00a0\u2013 From extreme cold to high heat, full coverage<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-091ba4d elementor-widget elementor-widget-button\" data-id=\"091ba4d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/hlconnector.com\/en\/contact\/\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Choose Our<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-bb10d26 e-flex e-con-boxed e-con e-parent\" data-id=\"bb10d26\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d6aac4c elementor-widget elementor-widget-spacer\" data-id=\"d6aac4c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-104d6f8 e-flex e-con-boxed e-con e-parent\" data-id=\"104d6f8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c466cbb elementor-widget elementor-widget-text-editor\" data-id=\"c466cbb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Recent Posta<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-783aa13 elementor-grid-3 elementor-grid-tablet-2 elementor-grid-mobile-1 elementor-posts--thumbnail-top elementor-widget elementor-widget-posts\" data-id=\"783aa13\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;classic_columns&quot;:&quot;3&quot;,&quot;classic_columns_tablet&quot;:&quot;2&quot;,&quot;classic_columns_mobile&quot;:&quot;1&quot;,&quot;classic_row_gap&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:35,&quot;sizes&quot;:[]},&quot;classic_row_gap_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;classic_row_gap_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"posts.classic\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-posts-container elementor-posts elementor-posts--skin-classic elementor-grid\" role=\"list\">\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-4424 post type-post status-publish format-standard has-post-thumbnail hentry category-mil-dtl-38999-connector category-uncategorized entry has-media owp-thumbs-layout-horizontal owp-btn-normal owp-tabs-layout-horizontal has-no-thumbnails has-product-nav\" role=\"listitem\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/hlconnector.com\/en\/coaxial-contact-vs-quadrax-contact-how-to-choose-the-high-speed-data-transmission-solution-for-38999\/\" tabindex=\"-1\" >\n\t\t\t<div class=\"elementor-post__thumbnail\"><img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/09\/\u56fe\u7247\u751f\u6210\u5206\u6790-1-300x108.png\" width=\"300\" height=\"108\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-medium size-medium wp-image-4431 lazyload\" alt=\"\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"108\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/09\/\u56fe\u7247\u751f\u6210\u5206\u6790-1-300x108.png\" class=\"attachment-medium size-medium wp-image-4431\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/09\/\u56fe\u7247\u751f\u6210\u5206\u6790-1-300x108.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/09\/\u56fe\u7247\u751f\u6210\u5206\u6790-1-1024x369.png 1024w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/09\/\u56fe\u7247\u751f\u6210\u5206\u6790-1-768x276.png 768w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/09\/\u56fe\u7247\u751f\u6210\u5206\u6790-1-1536x553.png 1536w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/09\/\u56fe\u7247\u751f\u6210\u5206\u6790-1-18x6.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/09\/\u56fe\u7247\u751f\u6210\u5206\u6790-1-600x216.png 600w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/09\/\u56fe\u7247\u751f\u6210\u5206\u6790-1.png 1920w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript><\/div>\n\t\t<\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/hlconnector.com\/en\/coaxial-contact-vs-quadrax-contact-how-to-choose-the-high-speed-data-transmission-solution-for-38999\/\" >\n\t\t\t\tCoaxial Contact vs Quadrax Contact: How to Choose the High-Speed Data Transmission Solution for 38999?\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tSeptember 4, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>Coaxial Contact vs Quadrax Contact: How to Choose the High-Speed<\/p>\n\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/hlconnector.com\/en\/coaxial-contact-vs-quadrax-contact-how-to-choose-the-high-speed-data-transmission-solution-for-38999\/\" aria-label=\"Read more about Coaxial Contact vs Quadrax Contact: How to Choose the High-Speed Data Transmission Solution for 38999?\" tabindex=\"-1\" >\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-4407 post type-post status-publish format-standard has-post-thumbnail hentry category-mil-dtl-38999-connector category-uncategorized entry has-media owp-thumbs-layout-horizontal owp-btn-normal owp-tabs-layout-horizontal has-no-thumbnails has-product-nav\" role=\"listitem\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/hlconnector.com\/en\/mil-dtl-38999-four-series-core-differences-and-selection-guide-for-series-i-ii-iii-iv\/\" tabindex=\"-1\" >\n\t\t\t<div class=\"elementor-post__thumbnail\"><img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/66-1-300x151.jpg\" width=\"300\" height=\"151\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-medium size-medium wp-image-4004 lazyload\" alt=\"\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"151\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/66-1-300x151.jpg\" class=\"attachment-medium size-medium wp-image-4004\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/66-1-300x151.jpg 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/66-1-1024x517.jpg 1024w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/66-1-768x388.jpg 768w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/66-1-1536x775.jpg 1536w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/66-1-2048x1034.jpg 2048w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/66-1-18x9.jpg 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/66-1-600x303.jpg 600w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript><\/div>\n\t\t<\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/hlconnector.com\/en\/mil-dtl-38999-four-series-core-differences-and-selection-guide-for-series-i-ii-iii-iv\/\" >\n\t\t\t\tMIL-DTL-38999 Four Series: Core Differences and Selection Guide for Series I\/II\/III\/IV\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tSeptember 2, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>MIL-DTL-38999 Four Series: Core Differences and Selection Guide for Series<\/p>\n\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/hlconnector.com\/en\/mil-dtl-38999-four-series-core-differences-and-selection-guide-for-series-i-ii-iii-iv\/\" aria-label=\"Read more about MIL-DTL-38999 Four Series: Core Differences and Selection Guide for Series I\/II\/III\/IV\" tabindex=\"-1\" >\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t<article class=\"elementor-post elementor-grid-item post-4397 post type-post status-publish format-standard has-post-thumbnail hentry category-mil-c-83513-connector category-uncategorized entry has-media owp-thumbs-layout-horizontal owp-btn-normal owp-tabs-layout-horizontal has-no-thumbnails has-product-nav\" role=\"listitem\">\n\t\t\t\t<a class=\"elementor-post__thumbnail__link\" href=\"https:\/\/hlconnector.com\/en\/500-mating-cycles-55c-to-125c-interpreting-the-performance-parameters-of-mil-c-83513\/\" tabindex=\"-1\" >\n\t\t\t<div class=\"elementor-post__thumbnail\"><img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-9-300x200.png\" width=\"300\" height=\"200\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" class=\"attachment-medium size-medium wp-image-3884 lazyload\" alt=\"\" \/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-9-300x200.png\" class=\"attachment-medium size-medium wp-image-3884\" alt=\"\" srcset=\"https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-9-300x200.png 300w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-9-1024x683.png 1024w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-9-768x512.png 768w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-9-1536x1024.png 1536w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-9-2048x1365.png 2048w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-9-18x12.png 18w, https:\/\/hlconnector.com\/wp-content\/uploads\/2026\/05\/\u56fe\u7247\u53d8\u6e05\u6670-9-600x400.png 600w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript><\/div>\n\t\t<\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<h3 class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/hlconnector.com\/en\/500-mating-cycles-55c-to-125c-interpreting-the-performance-parameters-of-mil-c-83513\/\" >\n\t\t\t\t500 Mating Cycles, -55\u00b0C to +125\u00b0C: Interpreting the Performance Parameters of MIL-C-83513\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tAugust 31, 2026\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__excerpt\">\n\t\t\t<p>500 Mating Cycles, -55\u00b0C to +125\u00b0C: Interpreting the Performance Parameters<\/p>\n\t\t<\/div>\n\t\t\n\t\t<a class=\"elementor-post__read-more\" href=\"https:\/\/hlconnector.com\/en\/500-mating-cycles-55c-to-125c-interpreting-the-performance-parameters-of-mil-c-83513\/\" aria-label=\"Read more about 500 Mating Cycles, -55\u00b0C to +125\u00b0C: Interpreting the Performance Parameters of MIL-C-83513\" tabindex=\"-1\" >\n\t\t\tRead More \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4f91275 e-flex e-con-boxed e-con e-parent\" data-id=\"4f91275\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-493be55 elementor-widget elementor-widget-spacer\" data-id=\"493be55\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>D38999 Part Number Fully Decoded: Shell Type + Material\/Plating + Size + Arrangement \u2014 A Selection Guide Our Products A String of Characters, a Set of Codes When you first see a part number like D38999\/20FA35PN, it may look like nothing more than a meaningless string of letters and numbers. 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