{"id":15760,"date":"2026-09-16T03:04:34","date_gmt":"2026-09-16T03:04:34","guid":{"rendered":"https:\/\/npt-lok.com\/?p=15760"},"modified":"2026-09-16T03:04:34","modified_gmt":"2026-09-16T03:04:34","slug":"hex-head-plug-dimensions-explained","status":"publish","type":"post","link":"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/","title":{"rendered":"Hex Head Plug Dimensions Explained"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">A <\/span><a href=\"https:\/\/npt-lok.com\/ar\/%d9%82%d8%a7%d8%a8%d8%b3-%d8%b3%d8%af%d8%a7%d8%b3%d9%8a\/\"><span style=\"font-weight: 400;\">hex head plug<\/span><\/a><span style=\"font-weight: 400;\"> is a pipe fitting with an external hex head. It seals the end of a threaded pipe, port, or opening\u2014either permanently or just for temporary use. You tighten or loosen it with a standard wrench or socket. This article shows you how to read hex head plug dimensions and gives you complete size charts for NPT, ISO tapered, ISO parallel, and metric threads.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-15765\" src=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/B-hex-plug-1.jpg\" alt=\"\" width=\"751\" height=\"235\" srcset=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/B-hex-plug-1.jpg 1920w, https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/B-hex-plug-1-768x240.jpg 768w, https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/B-hex-plug-1-1536x480.jpg 1536w, https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/B-hex-plug-1-18x6.jpg 18w\" sizes=\"auto, (max-width: 751px) 100vw, 751px\" \/><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u062c\u062f\u0648\u0644 \u0627\u0644\u0645\u062d\u062a\u0648\u064a\u0627\u062a<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u062a\u0628\u062f\u064a\u0644<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/#How_to_Read_Hex_Head_Plug_Dimensions\" >How to Read Hex Head Plug Dimensions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/#NPT_Hex_Head_Plug_Dimensions\" >NPT Hex Head Plug Dimensions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/#ISO_Tapered_Thread\" >ISO Tapered Thread<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/#ISO_Parallel_Thread\" >ISO Parallel Thread<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/#Metric_Thread\" >Metric Thread<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/#How_to_Choose_the_Right_Hex_Head_Plug\" >How to Choose the Right Hex Head Plug<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/#FAQ\" >\u0627\u0644\u062a\u0639\u0644\u064a\u0645\u0627\u062a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/#Choose_reliable_hex_head_plugs_supplier\" >Choose reliable hex head plugs supplier<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Read_Hex_Head_Plug_Dimensions\"><\/span><span style=\"font-weight: 400;\">How to Read Hex Head Plug Dimensions<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Hex head pipe plug dimensions depend on whether you use inch or metric standards. Hex head plug dimension tables typically include three key measurements:<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><span style=\"font-weight: 400;\">Symbol<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Name<\/span><\/td>\n<td><span style=\"font-weight: 400;\">What it means<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">L<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Length<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Total length of the plug. Measure from the top of the hex head to the end of the threads.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">F<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Hex \/ Wrench Size<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Width across the flats of the hex head. This is the wrench or socket size you need.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">B<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Thread Length<\/span><\/td>\n<td><span style=\"font-weight: 400;\">How much of the plug is threaded. This is the part that screws into the female threads.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"NPT_Hex_Head_Plug_Dimensions\"><\/span><span style=\"font-weight: 400;\">NPT Hex Head Plug Dimensions<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/npt-lok.com\/ar\/%d8%aa%d8%ac%d9%87%d9%8a%d8%b2%d8%a7%d8%aa-%d8%a3%d9%86%d8%a7%d8%a8%d9%8a%d8%a8-%d8%a7%d9%84%d8%a3%d8%ac%d9%87%d8%b2%d8%a9\/%d8%aa%d8%ac%d9%87%d9%8a%d8%b2%d8%a7%d8%aa-npt\/\"><span style=\"font-weight: 400;\">\u0645\u0639\u0627\u0647\u062f\u0629 \u062d\u0638\u0631 \u0627\u0644\u0627\u0646\u062a\u0634\u0627\u0631 \u0627\u0644\u0646\u0648\u0648\u064a<\/span><\/a><span style=\"font-weight: 400;\"> is the go-to thread in North America. It follows ASME B1.20.1. The table below covers NPTLOK hex head plugs from 1\/16&#8243; to 1 1\/2&#8243;. Inches first, millimeters in parentheses.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15764\" src=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/hex-head-plug-NPT-threads.png\" alt=\"\" width=\"364\" height=\"409\" srcset=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/hex-head-plug-NPT-threads.png 364w, https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/hex-head-plug-NPT-threads-11x12.png 11w\" sizes=\"auto, (max-width: 364px) 100vw, 364px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">NPT threads are self-sealing due to their tapered design. When tightening an NPT hex head plug, the threads deform slightly to fill gaps and create a metal-to-metal seal. For additional sealing security, PTFE tape or thread sealant is commonly applied.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"ISO_Tapered_Thread\"><\/span><span style=\"font-weight: 400;\">ISO Tapered Thread<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">ISO tapered threads\u2014also called BSPT or R threads\u2014are common in Europe and many other regions. They follow ISO 7\/1 and BS EN 10226-1. The table below gives hex head plug dimensions for these threads, from 1\/16&#8243; to 2&#8243;.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15762\" src=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/hex-head-plug-ISO-Tapered-Threads.png\" alt=\"\" width=\"355\" height=\"273\" srcset=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/hex-head-plug-ISO-Tapered-Threads.png 355w, https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/hex-head-plug-ISO-Tapered-Threads-16x12.png 16w\" sizes=\"auto, (max-width: 355px) 100vw, 355px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">ISO tapered threads have a 1:16 taper and a 55\u00b0 thread angle, which differs from the 60\u00b0 angle of NPT threads. They are not interchangeable with NPT threads, although they have similar nominal sizes. Attempting to join an NPT male to a BSPT female will cause the joint to get stuck within a few turns. But you can connect them through <\/span><a href=\"https:\/\/npt-lok.com\/ar\/%d8%aa%d8%ac%d9%87%d9%8a%d8%b2%d8%a7%d8%aa-%d8%a3%d9%86%d8%a7%d8%a8%d9%8a%d8%a8-%d8%a7%d9%84%d8%a3%d8%ac%d9%87%d8%b2%d8%a9\/bspp-to-npt-adapter\/\"><span style=\"font-weight: 400;\">adapters<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"ISO_Parallel_Thread\"><\/span><span style=\"font-weight: 400;\">ISO Parallel Thread<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">ISO parallel threads (also known as BSPP or G threads) are straight threads governed by ISO 228. They require a sealing washer or O-ring to achieve a leak-free seal because the threads themselves do not provide a sealing action. The table below shows hex head plug dimensions for ISO parallel threads from 1\/8&#8243; to 1&#8243;.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15763\" src=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/hex-head-plug-ISO-Parallel-threads.png\" alt=\"\" width=\"370\" height=\"351\" srcset=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/hex-head-plug-ISO-Parallel-threads.png 370w, https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/hex-head-plug-ISO-Parallel-threads-13x12.png 13w\" sizes=\"auto, (max-width: 370px) 100vw, 370px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">ISO parallel threads are commonly found in hydraulic and pneumatic systems, as well as in European instrumentation applications. Always use a bonded washer or O-ring with BSPP plugs to ensure a proper seal.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Metric_Thread\"><\/span><span style=\"font-weight: 400;\">Metric Thread<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Metric threads (M threads) are specified by nominal diameter and pitch, such as M14 x 1.5. They are governed by ISO 261 and ISO 262. The table below shows hex head plug dimensions for metric threads from M14 x 1.5 to M27 x 2.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15761\" src=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/hex-head-plug-Metric-Threads.png\" alt=\"\" width=\"370\" height=\"210\" srcset=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/hex-head-plug-Metric-Threads.png 370w, https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/hex-head-plug-Metric-Threads-18x10.png 18w\" sizes=\"auto, (max-width: 370px) 100vw, 370px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Metric hex head plugs are used in a wide range of industrial equipment, particularly in European machinery and automotive applications. The M series threads conform to ISO 261 (general purpose metric screw threads) and ISO 262 (selected sizes for screws, bolts, and nuts).<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Choose_the_Right_Hex_Head_Plug\"><\/span><span style=\"font-weight: 400;\">How to Choose the Right Hex Head Plug<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Picking a hex head plug isn&#8217;t complicated, but you do need to get four things right: thread type, size, material, and pressure rating.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Thread type is the big one. Get this wrong and nothing else matters. NPT is what you&#8217;ll find in North America. In Europe, it&#8217;s mostly ISO tapered (R) or ISO parallel (G). Metric (M) threads show up in European machinery and automotive stuff. Just don&#8217;t mix them. An NPT plug in a BSPT port won&#8217;t seal. Even if the sizes look close.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Size is next. Match it to your pipe or port. The tables in this article give you L, F, and B. The F dimension\u2014that&#8217;s your wrench size. Don&#8217;t overlook it.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">As for material, you&#8217;ve got options. SS316, SS304, carbon steel, brass. SS316 handles corrosion well\u2014think chemical plants, marine, nasty environments. Carbon steel is for high strength, hydraulic, heavy-duty. Brass is fine for water, oil, gas in plumbing and heating.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">About Pressure rating. Plugs come in 2000 lb, 3000 lb, and 6000 lb classes. 3000 lb is the workhorse for industrial piping. 6000 lb is for extreme high pressure and hydraulics. Always check the rating for your size and application. For example, NPTLOK 1\/2&#8243; NPT in SS316 or carbon steel, Good up to 7700 psig (530 bar).<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQ\"><\/span><span style=\"font-weight: 400;\">\u0627\u0644\u062a\u0639\u0644\u064a\u0645\u0627\u062a<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Q1. What is the difference between hex head and hollow hex plug?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A hex head plug has an external hex head, tightened with a standard wrench or socket. A hollow hex plug has an internal hex socket, tightened with an Allen key. Hex head plugs suit higher torque and external access; hollow hex plugs fit tight spaces.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Q2. Can hex head plugs be reused?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Yes, if threads are undamaged and the plug wasn&#8217;t over-tightened. Inspect threads and hex head before reuse. For critical sealing applications, replace the plug to ensure a reliable seal.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Q3. What is the maximum pressure rating for hex head plugs?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Hex head plugs come in 2000 lb, 3000 lb, and 6000 lb classes. Actual working pressure depends on size, material, and thread. Example: NPTLOK 1\/2-inch NPT SS316 plugs handle up to 7700 psig (530 bar).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Q4. What is the wrench size for a 1\/2&#8243; NPT hex head plug?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For NPTLOK 1\/2-inch NPT hex head plugs (SS-TPP-MN8), the F (Hex) dimension is 0.87 inch (22.2 mm). Use a 7\/8-inch wrench or socket.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Choose_reliable_hex_head_plugs_supplier\"><\/span><span style=\"font-weight: 400;\">Choose reliable hex head plugs supplier<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">NPTLOK is a manufacturer of hex head plugs and other precision pipe fittings, with over 20 years of production experience and ISO 9001:2015 certification. We supply SS316, SS304, carbon steel, and brass hex head plugs in NPT, ISO tapered, ISO parallel, and metric threads.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For custom sizes, OEM orders, or technical inquiries, please <\/span><a href=\"https:\/\/npt-lok.com\/ar\/%d8%a7%d8%aa%d8%b5%d9%84-%d9%84%d9%84%d8%ad%d8%b5%d9%88%d9%84-%d8%b9%d9%84%d9%89-%d8%b9%d8%b1%d8%b6-%d8%a3%d8%b3%d8%b9%d8%a7%d8%b1\/\"><span style=\"font-weight: 400;\">\u0627\u062a\u0635\u0644 \u0628\u0646\u0627<\/span><\/a><span style=\"font-weight: 400;\">. We offer MOQ from 10 pcs for trial orders and can provide material certificates and test reports upon request.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u064a\u062a\u0639\u0644\u0645 \u0623\u0643\u062b\u0631 <\/span><a href=\"https:\/\/npt-lok.com\/ar\/%d9%85%d8%b9%d9%84%d9%88%d9%85%d8%a7%d8%aa-%d8%b9%d9%86%d8%a7\/\"><span style=\"font-weight: 400;\">\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0639\u0646\u0627<\/span><\/a><span style=\"font-weight: 400;\"> or download our <\/span><a href=\"https:\/\/npt-lok.com\/ar\/%d8%aa%d9%86%d8%b2%d9%8a%d9%84-%d9%83%d8%aa%d8%a7%d9%84%d9%88%d8%ac-%d8%a7%d9%84%d9%85%d9%86%d8%aa%d8%ac\/\"><span style=\"font-weight: 400;\">\u0643\u062a\u0627\u0644\u0648\u062c<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>A hex head plug is a pipe fitting with an external hex head. It seals the end of a threaded pipe, port, or opening\u2014either permanently or just for temporary use. You tighten or loosen it with a standard wrench or socket. This article shows you how to read hex head plug dimensions and gives you [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-15760","post","type-post","status-publish","format-standard","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hex Head Plug Dimensions Explained - NPTLOK Instrumentation Tube Fittings and Valves<\/title>\n<meta name=\"description\" content=\"Hex head plug dimensions explained: complete NPT, ISO tapered, ISO parallel &amp; metric size charts. Includes wrench sizes, pressure ratings &amp; selection guide.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/\" \/>\n<meta property=\"og:locale\" content=\"ar_AR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hex Head Plug Dimensions Explained - NPTLOK Instrumentation Tube Fittings and Valves\" \/>\n<meta property=\"og:description\" content=\"Hex head plug dimensions explained: complete NPT, ISO tapered, ISO parallel &amp; metric size charts. Includes wrench sizes, pressure ratings &amp; selection guide.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/\" \/>\n<meta property=\"og:site_name\" content=\"NPTLOK Instrumentation Tube Fittings and Valves\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-16T03:04:34+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/B-hex-plug-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"NPTLOK\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0643\u064f\u062a\u0628 \u0628\u0648\u0627\u0633\u0637\u0629\" \/>\n\t<meta name=\"twitter:data1\" content=\"NPTLOK\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u0648\u0642\u062a \u0627\u0644\u0642\u0631\u0627\u0621\u0629 \u0627\u0644\u0645\u064f\u0642\u062f\u0651\u0631\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 \u062f\u0642\u0627\u0626\u0642\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/npt-lok.com\\\/hex-head-plug-dimensions-explained\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/npt-lok.com\\\/hex-head-plug-dimensions-explained\\\/\"},\"author\":{\"name\":\"NPTLOK\",\"@id\":\"https:\\\/\\\/npt-lok.com\\\/#\\\/schema\\\/person\\\/952fa6592fb0069202b037e7605d4e19\"},\"headline\":\"Hex Head Plug Dimensions Explained\",\"datePublished\":\"2026-09-16T03:04:34+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/npt-lok.com\\\/hex-head-plug-dimensions-explained\\\/\"},\"wordCount\":978,\"publisher\":{\"@id\":\"https:\\\/\\\/npt-lok.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/npt-lok.com\\\/hex-head-plug-dimensions-explained\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/npt-lok.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/B-hex-plug-1.jpg\",\"articleSection\":[\"Blog\"],\"inLanguage\":\"ar\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/npt-lok.com\\\/hex-head-plug-dimensions-explained\\\/\",\"url\":\"https:\\\/\\\/npt-lok.com\\\/hex-head-plug-dimensions-explained\\\/\",\"name\":\"Hex Head Plug Dimensions Explained - NPTLOK Instrumentation Tube Fittings and Valves\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/npt-lok.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/npt-lok.com\\\/hex-head-plug-dimensions-explained\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/npt-lok.com\\\/hex-head-plug-dimensions-explained\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/npt-lok.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/B-hex-plug-1.jpg\",\"datePublished\":\"2026-09-16T03:04:34+00:00\",\"description\":\"Hex head plug dimensions explained: complete NPT, ISO tapered, ISO parallel & metric size charts. Includes wrench sizes, pressure ratings & selection guide.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/npt-lok.com\\\/hex-head-plug-dimensions-explained\\\/#breadcrumb\"},\"inLanguage\":\"ar\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/npt-lok.com\\\/hex-head-plug-dimensions-explained\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ar\",\"@id\":\"https:\\\/\\\/npt-lok.com\\\/hex-head-plug-dimensions-explained\\\/#primaryimage\",\"url\":\"https:\\\/\\\/npt-lok.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/B-hex-plug-1.jpg\",\"contentUrl\":\"https:\\\/\\\/npt-lok.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/B-hex-plug-1.jpg\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/npt-lok.com\\\/hex-head-plug-dimensions-explained\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/npt-lok.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Hex Head Plug Dimensions Explained\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/npt-lok.com\\\/#website\",\"url\":\"https:\\\/\\\/npt-lok.com\\\/\",\"name\":\"NPTLOK Instrumentation Tube Fittings and Valves\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/npt-lok.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/npt-lok.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ar\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/npt-lok.com\\\/#organization\",\"name\":\"NPTLOK Instrumentation Tube Fittings and Valves\",\"url\":\"https:\\\/\\\/npt-lok.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ar\",\"@id\":\"https:\\\/\\\/npt-lok.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/npt-lok.com\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/cropped-cropped-NPT-LOK\u9ed1\u767d-e1787037014570.png\",\"contentUrl\":\"https:\\\/\\\/npt-lok.com\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/cropped-cropped-NPT-LOK\u9ed1\u767d-e1787037014570.png\",\"width\":260,\"height\":85,\"caption\":\"NPTLOK Instrumentation Tube Fittings and Valves\"},\"image\":{\"@id\":\"https:\\\/\\\/npt-lok.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/npt-lok.com\\\/#\\\/schema\\\/person\\\/952fa6592fb0069202b037e7605d4e19\",\"name\":\"NPTLOK\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ar\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/786b349f66bfff9c6f962d1bcfdeec2a96c09c6f1e30f21f2e6c2f994b4d7f5f?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/786b349f66bfff9c6f962d1bcfdeec2a96c09c6f1e30f21f2e6c2f994b4d7f5f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/786b349f66bfff9c6f962d1bcfdeec2a96c09c6f1e30f21f2e6c2f994b4d7f5f?s=96&d=mm&r=g\",\"caption\":\"NPTLOK\"},\"url\":\"https:\\\/\\\/npt-lok.com\\\/ar\\\/author\\\/dp_admin\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Hex Head Plug Dimensions Explained - NPTLOK Instrumentation Tube Fittings and Valves","description":"Hex head plug dimensions explained: complete NPT, ISO tapered, ISO parallel & metric size charts. Includes wrench sizes, pressure ratings & selection guide.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/","og_locale":"ar_AR","og_type":"article","og_title":"Hex Head Plug Dimensions Explained - NPTLOK Instrumentation Tube Fittings and Valves","og_description":"Hex head plug dimensions explained: complete NPT, ISO tapered, ISO parallel & metric size charts. Includes wrench sizes, pressure ratings & selection guide.","og_url":"https:\/\/npt-lok.com\/ar\/hex-head-plug-dimensions-explained\/","og_site_name":"NPTLOK Instrumentation Tube Fittings and Valves","article_published_time":"2026-09-16T03:04:34+00:00","og_image":[{"width":1920,"height":600,"url":"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/B-hex-plug-1.jpg","type":"image\/jpeg"}],"author":"NPTLOK","twitter_card":"summary_large_image","twitter_misc":{"\u0643\u064f\u062a\u0628 \u0628\u0648\u0627\u0633\u0637\u0629":"NPTLOK","\u0648\u0642\u062a \u0627\u0644\u0642\u0631\u0627\u0621\u0629 \u0627\u0644\u0645\u064f\u0642\u062f\u0651\u0631":"6 \u062f\u0642\u0627\u0626\u0642"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/npt-lok.com\/hex-head-plug-dimensions-explained\/#article","isPartOf":{"@id":"https:\/\/npt-lok.com\/hex-head-plug-dimensions-explained\/"},"author":{"name":"NPTLOK","@id":"https:\/\/npt-lok.com\/#\/schema\/person\/952fa6592fb0069202b037e7605d4e19"},"headline":"Hex Head Plug Dimensions Explained","datePublished":"2026-09-16T03:04:34+00:00","mainEntityOfPage":{"@id":"https:\/\/npt-lok.com\/hex-head-plug-dimensions-explained\/"},"wordCount":978,"publisher":{"@id":"https:\/\/npt-lok.com\/#organization"},"image":{"@id":"https:\/\/npt-lok.com\/hex-head-plug-dimensions-explained\/#primaryimage"},"thumbnailUrl":"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/B-hex-plug-1.jpg","articleSection":["Blog"],"inLanguage":"ar"},{"@type":"WebPage","@id":"https:\/\/npt-lok.com\/hex-head-plug-dimensions-explained\/","url":"https:\/\/npt-lok.com\/hex-head-plug-dimensions-explained\/","name":"Hex Head Plug Dimensions Explained - NPTLOK Instrumentation Tube Fittings and Valves","isPartOf":{"@id":"https:\/\/npt-lok.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/npt-lok.com\/hex-head-plug-dimensions-explained\/#primaryimage"},"image":{"@id":"https:\/\/npt-lok.com\/hex-head-plug-dimensions-explained\/#primaryimage"},"thumbnailUrl":"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/B-hex-plug-1.jpg","datePublished":"2026-09-16T03:04:34+00:00","description":"Hex head plug dimensions explained: complete NPT, ISO tapered, ISO parallel & metric size charts. Includes wrench sizes, pressure ratings & selection guide.","breadcrumb":{"@id":"https:\/\/npt-lok.com\/hex-head-plug-dimensions-explained\/#breadcrumb"},"inLanguage":"ar","potentialAction":[{"@type":"ReadAction","target":["https:\/\/npt-lok.com\/hex-head-plug-dimensions-explained\/"]}]},{"@type":"ImageObject","inLanguage":"ar","@id":"https:\/\/npt-lok.com\/hex-head-plug-dimensions-explained\/#primaryimage","url":"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/B-hex-plug-1.jpg","contentUrl":"https:\/\/npt-lok.com\/wp-content\/uploads\/2026\/09\/B-hex-plug-1.jpg"},{"@type":"BreadcrumbList","@id":"https:\/\/npt-lok.com\/hex-head-plug-dimensions-explained\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/npt-lok.com\/"},{"@type":"ListItem","position":2,"name":"Hex Head Plug Dimensions Explained"}]},{"@type":"WebSite","@id":"https:\/\/npt-lok.com\/#website","url":"https:\/\/npt-lok.com\/","name":"\u062a\u062c\u0647\u064a\u0632\u0627\u062a \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0648\u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u0642\u064a\u0627\u0633 NPTLOK","description":"","publisher":{"@id":"https:\/\/npt-lok.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/npt-lok.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ar"},{"@type":"Organization","@id":"https:\/\/npt-lok.com\/#organization","name":"\u062a\u062c\u0647\u064a\u0632\u0627\u062a \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 \u0648\u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u0642\u064a\u0627\u0633 NPTLOK","url":"https:\/\/npt-lok.com\/","logo":{"@type":"ImageObject","inLanguage":"ar","@id":"https:\/\/npt-lok.com\/#\/schema\/logo\/image\/","url":"https:\/\/npt-lok.com\/wp-content\/uploads\/2022\/08\/cropped-cropped-NPT-LOK\u9ed1\u767d-e1787037014570.png","contentUrl":"https:\/\/npt-lok.com\/wp-content\/uploads\/2022\/08\/cropped-cropped-NPT-LOK\u9ed1\u767d-e1787037014570.png","width":260,"height":85,"caption":"NPTLOK Instrumentation Tube Fittings and Valves"},"image":{"@id":"https:\/\/npt-lok.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/npt-lok.com\/#\/schema\/person\/952fa6592fb0069202b037e7605d4e19","name":"\u0646\u0628\u062a\u0644\u0648\u0643","image":{"@type":"ImageObject","inLanguage":"ar","@id":"https:\/\/secure.gravatar.com\/avatar\/786b349f66bfff9c6f962d1bcfdeec2a96c09c6f1e30f21f2e6c2f994b4d7f5f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/786b349f66bfff9c6f962d1bcfdeec2a96c09c6f1e30f21f2e6c2f994b4d7f5f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/786b349f66bfff9c6f962d1bcfdeec2a96c09c6f1e30f21f2e6c2f994b4d7f5f?s=96&d=mm&r=g","caption":"NPTLOK"},"url":"https:\/\/npt-lok.com\/ar\/author\/dp_admin\/"}]}},"_links":{"self":[{"href":"https:\/\/npt-lok.com\/ar\/wp-json\/wp\/v2\/posts\/15760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/npt-lok.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/npt-lok.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/npt-lok.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/npt-lok.com\/ar\/wp-json\/wp\/v2\/comments?post=15760"}],"version-history":[{"count":1,"href":"https:\/\/npt-lok.com\/ar\/wp-json\/wp\/v2\/posts\/15760\/revisions"}],"predecessor-version":[{"id":15766,"href":"https:\/\/npt-lok.com\/ar\/wp-json\/wp\/v2\/posts\/15760\/revisions\/15766"}],"wp:attachment":[{"href":"https:\/\/npt-lok.com\/ar\/wp-json\/wp\/v2\/media?parent=15760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/npt-lok.com\/ar\/wp-json\/wp\/v2\/categories?post=15760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/npt-lok.com\/ar\/wp-json\/wp\/v2\/tags?post=15760"}],"curies":[{"name":"\u0648\u0648\u0631\u062f\u0628\u0631\u064a\u0633","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}