{"id":2407,"date":"2025-12-09T14:15:02","date_gmt":"2025-12-09T06:15:02","guid":{"rendered":"https:\/\/sj-gauge.com\/?p=2407"},"modified":"2026-04-24T19:45:18","modified_gmt":"2026-04-24T11:45:18","slug":"thread-standards-identification","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/vi\/thread-standards-identification\/","title":{"rendered":"Gi\u1edbi thi\u1ec7u v\u1ec1 Ti\u00eau chu\u1ea9n ren th\u00f4ng d\u1ee5ng cho thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p: B\u1ed1n b\u01b0\u1edbc \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ren!"},"content":{"rendered":"<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>B\u1ea1n c\u00f3 c\u1ea3m th\u1ea5y b\u1ed1i r\u1ed1i tr\u01b0\u1edbc c\u00e1c thu\u1eadt ng\u1eef nh\u01b0 \u201cren\u201d, \u201cren v\u00edt\u201d, \u201ck\u1ebft n\u1ed1i\u201d hay \u201cph\u1ee5 ki\u1ec7n\u201d, c\u0169ng nh\u01b0 tr\u01b0\u1edbc v\u00f4 s\u1ed1 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt hi\u1ec7n c\u00f3 kh\u00f4ng?<\/strong><\/p>\n\n\n\n<p>SJ Gauge cung c\u1ea5p b\u1ed1n lo\u1ea1i k\u1ebft n\u1ed1i ren ch\u00ednh: NPT, PT, G v\u00e0 M. B\u1ea1n \u0111ang b\u0103n kho\u0103n kh\u00f4ng bi\u1ebft lo\u1ea1i n\u00e0o ph\u00f9 h\u1ee3p nh\u1ea5t v\u1edbi y\u00eau c\u1ea7u \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 c\u1ee7a m\u00ecnh? Trong b\u00e0i vi\u1ebft sau \u0111\u00e2y, ch\u00fang t\u00f4i s\u1ebd gi\u1edbi thi\u1ec7u chi ti\u1ebft v\u1ec1 c\u00e1c lo\u1ea1i ren n\u00e0y. N\u1ebfu b\u1ea1n t\u00f2 m\u00f2 v\u1ec1 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u00fang, vui l\u00f2ng ti\u1ebfp t\u1ee5c \u0111\u1ecdc. Ngo\u00e0i ra, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 li\u00ean h\u1ec7 v\u1edbi \u0111\u1ed9i ng\u0169 b\u00e1n h\u00e0ng chuy\u00ean nghi\u1ec7p c\u1ee7a ch\u00fang t\u00f4i \u2014 ch\u00fang t\u00f4i s\u1ebd r\u1ea5t vui l\u00f2ng \u0111\u1ec1 xu\u1ea5t gi\u1ea3i ph\u00e1p \u0111o l\u01b0\u1eddng t\u00f9y ch\u1ec9nh ph\u00f9 h\u1ee3p nh\u1ea5t cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n.<\/p>\n<\/blockquote>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">M\u1ee5c l\u1ee5c<\/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=\"B\u1eadt\/t\u1eaft M\u1ee5c l\u1ee5c\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">B\u1eadt\/T\u1eaft<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #7b1e1c;color:#7b1e1c\" 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: #7b1e1c;color:#7b1e1c\" 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:\/\/www.sj-gauge.com\/vi\/thread-standards-identification\/#1-what-is-a-thread-what-is-its-function\" >1. Chu\u1ed7i l\u00e0 g\u00ec? Ch\u1ee9c n\u0103ng c\u1ee7a n\u00f3 l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.sj-gauge.com\/vi\/thread-standards-identification\/#2-what-problems-can-occur-if-the-wrong-thread-type-is-used\" >2. S\u1ebd g\u1eb7p ph\u1ea3i nh\u1eefng v\u1ea5n \u0111\u1ec1 g\u00ec n\u1ebfu s\u1eed d\u1ee5ng lo\u1ea1i ren kh\u00f4ng ph\u00f9 h\u1ee3p?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.sj-gauge.com\/vi\/thread-standards-identification\/#3-two-essential-measurement-tools-you-must-know-before-selecting-threads\" >3. Hai c\u00f4ng c\u1ee5 \u0111o l\u01b0\u1eddng thi\u1ebft y\u1ebfu b\u1ea1n c\u1ea7n bi\u1ebft tr\u01b0\u1edbc khi ch\u1ecdn ren<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.sj-gauge.com\/vi\/thread-standards-identification\/#4-identifying-threads-in-four-simple-steps\" >4. X\u00e1c \u0111\u1ecbnh c\u00e1c lu\u1ed3ng trong b\u1ed1n b\u01b0\u1edbc \u0111\u01a1n gi\u1ea3n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.sj-gauge.com\/vi\/thread-standards-identification\/#5-four-steps-to-identify-thread-specifications\" >5. B\u1ed1n b\u01b0\u1edbc \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a s\u1ee3i<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-60a6e82b1b17efd4e0d6a39a4129c216\" id=\"h-1-what-is-a-thread-what-is-its-function\"><span class=\"ez-toc-section\" id=\"1-what-is-a-thread-what-is-its-function\"><\/span>1. Chu\u1ed7i l\u00e0 g\u00ec? Ch\u1ee9c n\u0103ng c\u1ee7a n\u00f3 l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ren, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi \u0111\u01a1n gi\u1ea3n l\u00e0 \u0111\u1ea7u n\u1ed1i ho\u1eb7c kh\u1edbp n\u1ed1i, l\u00e0 b\u1ed9 ph\u1eadn d\u00f9ng \u0111\u1ec3 k\u1ebft n\u1ed1i \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t v\u1edbi ngu\u1ed3n \u00e1p su\u1ea5t. N\u00f3 bao g\u1ed3m m\u1ed9t ren \u0111\u1ef1c (ren ngo\u00e0i) v\u00e0 m\u1ed9t ren c\u00e1i (ren trong), \u0111\u01b0\u1ee3c v\u1eb7n ch\u1eb7t v\u00e0o nhau \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t k\u1ebft n\u1ed1i ch\u1eafc ch\u1eafn.<\/p>\n\n\n\n<p>Ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a ren l\u00e0 \u0111\u1ea3m b\u1ea3o \u00e1p su\u1ea5t ho\u1eb7c ch\u1ea5t l\u1ecfng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy\u1ec1n t\u1eeb ngu\u1ed3n \u00e1p su\u1ea5t \u0111\u1ebfn \u0111\u1ed3ng h\u1ed3 \u0111o trong \u0111i\u1ec1u ki\u1ec7n ho\u00e0n to\u00e0n k\u00edn. Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, ng\u01b0\u1eddi ta s\u1eed d\u1ee5ng c\u00e1c ph\u1ee5 ki\u1ec7n l\u00e0m k\u00edn b\u1ed5 sung nh\u01b0 b\u0103ng PTFE, v\u00f2ng \u0111\u1ec7m O-ring ho\u1eb7c mi\u1ebfng \u0111\u1ec7m \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u qu\u1ea3 l\u00e0m k\u00edn.<\/p>\n\n\n\n<p>Do \u0111\u00f3, khi l\u1ef1a ch\u1ecdn k\u00edch th\u01b0\u1edbc ren, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi \u0111\u1ea7u n\u1ed1i c\u1ee7a thi\u1ebft b\u1ecb t\u01b0\u01a1ng \u1ee9ng. Khi mua c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t ho\u1eb7c nhi\u1ec7t k\u1ebf, c\u0169ng n\u00ean cung c\u1ea5p tr\u01b0\u1edbc cho nh\u00e0 cung c\u1ea5p c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u1ec1 ren theo y\u00eau c\u1ea7u.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-8 wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\" style=\"border-style:none;border-width:0px;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-left-radius:0px;border-bottom-right-radius:0px\">\n<figure class=\"wp-block-image size-thumbnail has-custom-border is-style-default\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img decoding=\"async\" width=\"92\" height=\"150\" data-id=\"2408\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/PT\u516b\u5206\u4e4b\u4e00-92x150.png\" alt=\"\" class=\"wp-image-2408\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">Ph\u1ea7n 1\/8<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img decoding=\"async\" width=\"90\" height=\"150\" data-id=\"2409\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/PT\u56db\u5206\u4e4b\u4e0019\u7259-90x150.png\" alt=\"\" class=\"wp-image-2409\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">Ph\u1ea7n 1\/4<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img decoding=\"async\" width=\"114\" height=\"150\" data-id=\"2410\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/PT\u516b\u5206\u4e4b\u4e09-114x150.png\" alt=\"\" class=\"wp-image-2410\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">PT 3\/8<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"150\" data-id=\"2411\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/PT\u4e8c\u5206\u4e4b\u4e00-116x150.png\" alt=\"\" class=\"wp-image-2411\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">Ph\u1ea7n 1\/2<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"150\" data-id=\"2412\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/\u7f8e\u5236\u5341\u516d\u5206\u4e4b\u4e03-93x150.png\" alt=\"\" class=\"wp-image-2412\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">UNF 7\/16<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img loading=\"lazy\" decoding=\"async\" width=\"105\" height=\"150\" data-id=\"2413\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/NPT\u56db\u5206\u4e4b\u4e0018\u7259-105x150.png\" alt=\"\" class=\"wp-image-2413\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">NPT 1\/4<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"150\" data-id=\"2415\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/NPT\u516b\u5206\u4e4b\u4e09-116x150.png\" alt=\"\" class=\"wp-image-2415\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">NPT 3\/8<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-right:0;margin-bottom:var(--wp--preset--spacing--80);margin-left:0\"><img loading=\"lazy\" decoding=\"async\" width=\"115\" height=\"150\" data-id=\"2416\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/NPT\u4e8c\u5206\u4e4b\u4e00-115x150.png\" alt=\"\" class=\"wp-image-2416\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">NPT 1\/2<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img loading=\"lazy\" decoding=\"async\" width=\"91\" height=\"150\" data-id=\"2419\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/G\u56db\u5206\u4e4b\u4e0019\u7259-91x150.png\" alt=\"\" class=\"wp-image-2419\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">G 1\/4<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img loading=\"lazy\" decoding=\"async\" width=\"100\" height=\"150\" data-id=\"2420\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/G\u516b\u5206\u4e4b\u4e09-100x150.png\" alt=\"\" class=\"wp-image-2420\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">G 3\/8<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"150\" data-id=\"2421\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/G\u4e8c\u5206\u4e4b\u4e00-116x150.png\" alt=\"\" class=\"wp-image-2421\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">G 1\/2<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"150\" data-id=\"2422\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/M10x1-84x150.png\" alt=\"\" class=\"wp-image-2422\" style=\"border-style:none;border-width:0px;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-left-radius:0px;border-bottom-right-radius:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">M 10*1<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img loading=\"lazy\" decoding=\"async\" width=\"91\" height=\"150\" data-id=\"2423\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/M12x1.5-91x150.png\" alt=\"\" class=\"wp-image-2423\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">M 12 \u00d7 1,5<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img loading=\"lazy\" decoding=\"async\" width=\"93\" height=\"150\" data-id=\"2424\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/M14x1.5-93x150.png\" alt=\"\" class=\"wp-image-2424\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">M 14 \u00d7 1,5<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-right:0;margin-bottom:var(--wp--preset--spacing--80);margin-left:0\"><img loading=\"lazy\" decoding=\"async\" width=\"86\" height=\"150\" data-id=\"2425\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/M16x1.5-1-86x150.png\" alt=\"\" class=\"wp-image-2425\" style=\"border-style:none;border-width:0px;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-left-radius:0px;border-bottom-right-radius:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">M 16 \u00d7 1,5<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-thumbnail has-custom-border\" style=\"margin-top:var(--wp--preset--spacing--80);margin-bottom:var(--wp--preset--spacing--80)\"><img loading=\"lazy\" decoding=\"async\" width=\"109\" height=\"150\" data-id=\"2426\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/M20x1.5-109x150.png\" alt=\"\" class=\"wp-image-2426\" style=\"border-style:none;border-width:0px;aspect-ratio:9\/16\"\/><figcaption class=\"wp-element-caption\">M 20 \u00d7 1,5<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-e6d4c9f5365a519eea70d069d7a5d426\" id=\"h-2-what-problems-can-occur-if-the-wrong-thread-type-is-used\"><span class=\"ez-toc-section\" id=\"2-what-problems-can-occur-if-the-wrong-thread-type-is-used\"><\/span>2. S\u1ebd g\u1eb7p ph\u1ea3i nh\u1eefng v\u1ea5n \u0111\u1ec1 g\u00ec n\u1ebfu s\u1eed d\u1ee5ng lo\u1ea1i ren kh\u00f4ng ph\u00f9 h\u1ee3p?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Tr\u01b0\u1edbc khi x\u00e1c nh\u1eadn ch\u00ednh x\u00e1c lo\u1ea1i k\u1ebft n\u1ed1i ren, tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ed1 g\u1eafng l\u1eafp ren v\u00e0o thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n. Vi\u1ec7c l\u00e0m n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u01b0 h\u1ecfng thi\u1ebft b\u1ecb, gi\u00e1n \u0111o\u1ea1n s\u1ea3n xu\u1ea5t, th\u1eadm ch\u00ed l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 ho\u1ea1t \u0111\u1ed9ng ho\u1eb7c g\u00e2y ra t\u1ed5n th\u1ea5t t\u00e0i ch\u00ednh.<br>Ngo\u00e0i ra, ch\u1ec9 d\u1ef1a v\u00e0o ki\u1ec3m tra b\u1eb1ng m\u1eaft th\u01b0\u1eddng l\u00e0 ch\u01b0a \u0111\u1ee7 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c li\u1ec7u ki\u1ec3u k\u1ebft n\u1ed1i ren c\u00f3 \u0111\u00fang hay kh\u00f4ng.<\/p>\n\n\n\n<p><strong>T\u1ea1i sao vi\u1ec7c x\u00e1c \u0111\u1ecbnh \u0111\u00fang lo\u1ea1i ren l\u1ea1i quan tr\u1ecdng?<\/strong><\/p>\n\n\n\n<p>Khi c\u1ed1 g\u1eafng k\u1ebft n\u1ed1i hai lo\u1ea1i ren kh\u00e1c nhau, s\u1ef1 ch\u00eanh l\u1ec7ch v\u1ec1 b\u01b0\u1edbc ren ho\u1eb7c \u0111\u01b0\u1eddng k\u00ednh c\u00f3 th\u1ec3 c\u1ea3n tr\u1edf vi\u1ec7c kh\u1edbp n\u1ed1i ch\u00ednh x\u00e1c, khi\u1ebfn kh\u00f4ng th\u1ec3 si\u1ebft ch\u1eb7t ho\u00e0n to\u00e0n m\u1ed1i n\u1ed1i. N\u1ebfu c\u1ed1 g\u1eafng l\u1eafp \u0111\u1eb7t b\u1eb1ng l\u1ef1c, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 g\u00e2y bi\u1ebfn d\u1ea1ng g\u00f3c ren, l\u00e0m h\u1ecfng ren ho\u1eb7c khi\u1ebfn m\u1ed1i n\u1ed1i b\u1ecb k\u1eb9t c\u1ee9ng ho\u00e0n to\u00e0n. Ngay c\u1ea3 khi sau n\u00e0y m\u1ed1i n\u1ed1i \u0111\u01b0\u1ee3c th\u00e1o ra kh\u1ecfi \u0111\u01b0\u1eddng \u1ed1ng, vi\u1ec7c \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 k\u00edn kh\u00edt \u0111\u00fang c\u00e1ch c\u00f3 th\u1ec3 kh\u00f4ng c\u00f2n kh\u1ea3 thi.<\/p>\n\n\n\n<p>Nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn r\u00f2 r\u1ec9 ch\u1ea5t l\u1ecfng, nhi\u1ec5m b\u1ea9n ho\u1eb7c h\u1ecfng h\u00f3c thi\u1ebft b\u1ecb. May m\u1eafn thay, b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c lo\u1ea1i ren ph\u00f9 h\u1ee3p, nh\u1eefng r\u1ee7i ro n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u \u0111\u00e1ng k\u1ec3.<\/p>\n\n\n\n<p>Trong ph\u1ea7n ti\u1ebfp theo, SJ Gauge s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n v\u1ec1 c\u00e1c lo\u1ea1i ren kh\u00e1c nhau v\u00e0 c\u00e1ch \u0111o ch\u00fang.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color\" id=\"h-3-two-essential-measurement-tools-you-must-know-before-selecting-threads\"><span class=\"ez-toc-section\" id=\"3-two-essential-measurement-tools-you-must-know-before-selecting-threads\"><\/span>3. Hai c\u00f4ng c\u1ee5 \u0111o l\u01b0\u1eddng thi\u1ebft y\u1ebfu b\u1ea1n c\u1ea7n bi\u1ebft tr\u01b0\u1edbc khi ch\u1ecdn ren<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-a-vernier-caliper\">a. <strong>Th\u01b0\u1edbc k\u1eb9p Vernier<\/strong><\/h3>\n\n\n\n<p>Th\u01b0\u1edbc k\u1eb9p vernier, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cth\u01b0\u1edbc vernier\u201d ho\u1eb7c \u201cth\u01b0\u1edbc k\u1eb9p tr\u01b0\u1ee3t\u201d, l\u00e0 m\u1ed9t d\u1ee5ng c\u1ee5 \u0111o l\u01b0\u1eddng c\u00f4ng nghi\u1ec7p chuy\u00ean d\u1ee5ng d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh chi\u1ec1u d\u00e0i, \u0111\u01b0\u1eddng k\u00ednh trong, \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i v\u00e0 \u0111\u1ed9 s\u00e2u. D\u1ee5ng c\u1ee5 n\u00e0y bao g\u1ed3m m\u1ed9t thang \u0111o ch\u00ednh v\u00e0 m\u1ed9t thang \u0111o vernier tr\u01b0\u1ee3t di chuy\u1ec3n d\u1ecdc theo th\u00e2n ch\u00ednh.<\/p>\n\n\n\n<p>Thang \u0111o ch\u00ednh th\u01b0\u1eddng \u0111\u01b0\u1ee3c chia v\u1ea1ch theo \u0111\u01a1n v\u1ecb milim\u00e9t. T\u00f9y thu\u1ed9c v\u00e0o s\u1ed1 v\u1ea1ch chia, th\u01b0\u1edbc k\u1eb9p Vernier \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh c\u00e1c lo\u1ea1i 10 v\u1ea1ch, 20 v\u1ea1ch ho\u1eb7c 50 v\u1ea1ch, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 th\u01b0\u1edbc k\u1eb9p c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i 0,1 mm, 0,05 mm v\u00e0 0,02 mm t\u01b0\u01a1ng \u1ee9ng.<\/p>\n\n\n\n<p>Ng\u00e0y nay, th\u01b0\u1edbc k\u1eb9p vernier c\u00f3 nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau. Ngo\u00e0i lo\u1ea1i c\u01a1 h\u1ecdc truy\u1ec1n th\u1ed1ng nh\u01b0 h\u00ecnh tr\u00ean, c\u00f2n c\u00f3 th\u01b0\u1edbc k\u1eb9p kim (c\u00f3 kim ch\u1ec9 th\u1ecb) v\u00e0 th\u01b0\u1edbc k\u1eb9p \u0111i\u1ec7n t\u1eed (c\u00f3 m\u00e0n h\u00ecnh LCD).<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"801\" height=\"534\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/3-XX.jpg\" alt=\"\" class=\"wp-image-2427\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/3-XX.jpg 801w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/3-XX-300x200.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/3-XX-768x512.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/3-XX-600x400.jpg 600w\" sizes=\"(max-width: 801px) 100vw, 801px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-b-thread-pitch-gauge\">b. Th\u01b0\u1edbc \u0111o b\u01b0\u1edbc ren<\/h3>\n\n\n\n<p>M\u00e1y \u0111o b\u01b0\u1edbc ren, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cm\u00e1y \u0111o b\u01b0\u1edbc v\u00edt\u201d ho\u1eb7c \u201cm\u00e1y \u0111o ren\u201d, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 h\u1ed7 tr\u1ee3 vi\u1ec7c \u0111o c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a ren. B\u1eb1ng c\u00e1ch so kh\u1edbp c\u00e1c r\u0103ng c\u1ee7a m\u00e1y \u0111o v\u1edbi h\u00ecnh d\u1ea1ng ren v\u00e0 t\u00ecm ra \u0111i\u1ec3m kh\u1edbp ho\u00e0n h\u1ea3o, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c b\u01b0\u1edbc ren.<\/p>\n\n\n\n<p>C\u00e1c ti\u00eau chu\u1ea9n ren \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t tr\u00ean th\u1ecb tr\u01b0\u1eddng bao g\u1ed3m h\u1ec7 th\u1ed1ng M\u1ef9 (Imperial), Anh v\u00e0 M\u00e9t, m\u1ed7i h\u1ec7 th\u1ed1ng \u0111\u1ec1u c\u00f3 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u1ec1 th\u01b0\u1edbc \u0111o ren t\u01b0\u01a1ng \u1ee9ng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"920\" height=\"464\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/1-XX.jpg\" alt=\"\" class=\"wp-image-2428\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/1-XX.jpg 920w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/1-XX-300x151.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/1-XX-768x387.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/1-XX-600x303.jpg 600w\" sizes=\"(max-width: 920px) 100vw, 920px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-1ba7160b8449ca63db49d8f0224f718d\" id=\"h-4-identifying-threads-in-four-simple-steps\"><span class=\"ez-toc-section\" id=\"4-identifying-threads-in-four-simple-steps\"><\/span>4. X\u00e1c \u0111\u1ecbnh c\u00e1c lu\u1ed3ng trong b\u1ed1n b\u01b0\u1edbc \u0111\u01a1n gi\u1ea3n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-a-determine-whether-the-thread-is-parallel-or-tapered\">a. X\u00e1c \u0111\u1ecbnh xem ren l\u00e0 ren th\u1eb3ng hay ren c\u00f4n<\/h3>\n\n\n\n<p>C\u00e1c lu\u1ed3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh <strong>song song (th\u1eb3ng)<\/strong> ho\u1eb7c <strong>thu\u00f4n nh\u1ecdn<\/strong>. N\u1ebfu \u0111\u01b0\u1eddng k\u00ednh ren t\u0103ng ho\u1eb7c gi\u1ea3m d\u1ea7n theo chi\u1ec1u d\u00e0i, \u0111\u00f3 l\u00e0 ren c\u00f4n. N\u1ebfu \u0111\u01b0\u1eddng k\u00ednh kh\u00f4ng \u0111\u1ed5i, \u0111\u00f3 l\u00e0 ren song song.<\/p>\n\n\n\n<p>N\u1ebfu kh\u00f3 ph\u00e2n bi\u1ec7t b\u1eb1ng m\u1eaft th\u01b0\u1eddng, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng th\u01b0\u1edbc k\u1eb9p Vernier \u0111\u1ec3 h\u1ed7 tr\u1ee3. Ch\u1ec9 c\u1ea7n \u0111o c\u1ea3 hai \u0111\u1ea7u c\u1ee7a ren v\u00e0 quan s\u00e1t khe h\u1edf ho\u1eb7c \u0111\u1ed9 th\u1eb3ng h\u00e0ng. N\u1ebfu xu\u1ea5t hi\u1ec7n khe h\u1edf h\u00ecnh tam gi\u00e1c (cho th\u1ea5y c\u00e1c c\u1ea1nh kh\u00f4ng song song), \u0111\u00f3 l\u00e0 ren c\u00f4n. N\u1ebfu c\u1ea3 hai c\u1ea1nh v\u1eabn song song v\u00e0 kh\u00f4ng c\u00f3 khe h\u1edf n\u00e0o nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c, \u0111\u00f3 l\u00e0 ren song song.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"724\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/05\/\u6280\u8853\u7814\u8a0e06EN-1-1024x724.jpg\" alt=\"\" class=\"wp-image-4435\" style=\"width:500px\" srcset=\"\" sizes=\"(max-width: 1024px) 100vw, 1024px\" data-srcset=\"\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-b-determine-the-type-of-thread-and-pitch\">b. X\u00e1c \u0111\u1ecbnh lo\u1ea1i ren v\u00e0 b\u01b0\u1edbc ren<\/h3>\n\n\n\n<p>C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a s\u1ee3i th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111o l\u01b0\u1eddng d\u1ef1a tr\u00ean c\u00e1c ti\u00eau chu\u1ea9n nh\u01b0 <strong>Ti\u00eau chu\u1ea9n M\u1ef9 (NPT\/UN), Anh (BSP) v\u00e0 h\u1ec7 m\u00e9t (M)<\/strong> h\u1ec7 th\u1ed1ng. Lo\u1ea1i ren ph\u00f9 h\u1ee3p \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng c\u00e1ch so s\u00e1nh v\u1edbi th\u01b0\u1edbc \u0111o ren cho \u0111\u1ed9 kh\u00edt t\u1ed1t nh\u1ea5t.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1754\" height=\"1240\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-screw-pitch-gauge.jpg\" alt=\"\" class=\"wp-image-4464\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-screw-pitch-gauge.jpg 1754w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-screw-pitch-gauge-300x212.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-screw-pitch-gauge-1024x724.jpg 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-screw-pitch-gauge-768x543.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-screw-pitch-gauge-1536x1086.jpg 1536w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-screw-pitch-gauge-18x12.jpg 18w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-screw-pitch-gauge-600x424.jpg 600w\" sizes=\"(max-width: 1754px) 100vw, 1754px\" \/><\/figure>\n\n\n\n<p>C\u00f3 hai c\u00e1ch ch\u00ednh \u0111\u1ec3 bi\u1ec3u th\u1ecb b\u01b0\u1edbc ren:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>H\u1ec7 m\u00e9t:<\/strong> \u0110o kho\u1ea3ng c\u00e1ch gi\u1eefa hai \u0111\u1ec9nh ren li\u1ec1n k\u1ec1<br>(v\u00ed d\u1ee5: kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111\u1ec9nh l\u00e0 1,5 mm)<\/li>\n\n\n\n<li><strong>H\u1ec7 th\u1ed1ng Anh:<\/strong> \u0110o s\u1ed1 s\u1ee3i tr\u00ean m\u1ed7i inch (TPI)<br>(v\u00ed d\u1ee5: 14 s\u1ee3i tr\u00ean m\u1ed7i inch)<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"842\" height=\"595\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/luoya2.jpg\" alt=\"\" class=\"wp-image-2431\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/luoya2.jpg 842w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/luoya2-300x212.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/luoya2-768x543.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/luoya2-600x424.jpg 600w\" sizes=\"(max-width: 842px) 100vw, 842px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-c-determine-the-size-of-the-connector\">c. X\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc c\u1ee7a \u0111\u1ea7u n\u1ed1i<\/h3>\n\n\n\n<p>S\u1eed d\u1ee5ng th\u01b0\u1edbc k\u1eb9p \u0111\u1ec3 \u0111o \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u1ee7a ren b\u1eb1ng c\u00e1ch k\u1eb9p ch\u1eb7t c\u1ea3 hai \u0111\u1ea7u c\u1ee7a ren. \u0110i\u1ec1u n\u00e0y s\u1ebd cho b\u1ea1n gi\u00e1 tr\u1ecb g\u1ea7n \u0111\u00fang v\u1ec1 k\u00edch th\u01b0\u1edbc c\u1ee7a ph\u1ee5 ki\u1ec7n. Sau \u0111\u00f3, so s\u00e1nh gi\u00e1 tr\u1ecb \u0111o \u0111\u01b0\u1ee3c v\u1edbi b\u1ea3ng tham chi\u1ebfu d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng \u1ee9ng g\u1ea7n nh\u1ea5t.<\/p>\n\n\n\n<p>C\u00e1c thu\u1eadt ng\u1eef ng\u00e0nh Common v\u1ec1 k\u00edch th\u01b0\u1edbc ren c\u0169ng \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 tham kh\u1ea3o:<\/p>\n\n\n\n<figure class=\"wp-block-flexible-table-block-table is-style-default\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>B\u1ed1i c\u1ea3nh \u0110\u00e0i Loan<\/strong><\/th><th>K\u00edch th\u01b0\u1edbc ren<\/th><th>\u0110\u01b0\u1eddng k\u00ednh ngo\u00e0i (mm)<\/th><\/tr><\/thead><tbody><tr><td>M\u1ed9t ph\u1ea7n t\u00e1m<\/td><td>1\/8<\/td><td>9,7 \u2013 10,3<\/td><\/tr><tr><td>Qu\u00fd<\/td><td>1\/4<\/td><td>13.1 \u2013 13.6<\/td><\/tr><tr><td>Ba ph\u1ea7n t\u00e1m<\/td><td>3\/8<\/td><td>16,6 \u2013 17,1<\/td><\/tr><tr><td>M\u1ed9t n\u1eeda<\/td><td>1\/2<\/td><td>20,9 \u2013 21,3<\/td><\/tr><tr><td>Ba ph\u1ea7n t\u01b0<\/td><td>3\/4<\/td><td>26\/4 \u2013 26\/6<\/td><\/tr><\/tbody><\/table><figcaption>B\u1ea3ng tham chi\u1ebfu k\u00edch th\u01b0\u1edbc ren Common<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"964\" height=\"445\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/4-3_\u5c3a\u5bf8.png\" alt=\"\" class=\"wp-image-2432\" style=\"width:500px\" srcset=\"\" sizes=\"(max-width: 964px) 100vw, 964px\" data-srcset=\"\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-d-compare-with-thread-standards-type-pitch-size\">d. So s\u00e1nh v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n ren (Lo\u1ea1i \/ B\u01b0\u1edbc ren \/ K\u00edch th\u01b0\u1edbc)<\/h3>\n\n\n\n<p>B\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e1c th\u00f4ng tin v\u00e0 b\u1ea3ng t\u1ed5ng h\u1ee3p sau \u0111\u00e2y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c lo\u1ea1i ren ph\u1ed5 bi\u1ebfn nh\u1ea5t, bao g\u1ed3m <strong>Ti\u00eau chu\u1ea9n M\u1ef9, Anh v\u00e0 h\u1ec7 m\u00e9t<\/strong>, b\u1eb1ng c\u00e1ch so s\u00e1nh h\u00ecnh d\u1ea1ng ren (song song\/thu\u00f4n nh\u1ecdn), b\u01b0\u1edbc ren v\u00e0 k\u00edch th\u01b0\u1edbc.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-d-1-american-standard-straight-threads-sae-un-unf\">d-1. <strong>Ren th\u1eb3ng ti\u00eau chu\u1ea9n M\u1ef9 (SAE=UN=UNF)<\/strong><\/h4>\n\n\n\n<p>Lo\u1ea1i ren th\u1eb3ng ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1ea1i Hoa K\u1ef3 l\u00e0 <strong>Ch\u1ee7 \u0111\u1ec1 v\u1ec1 UN\/UNF (Ph\u1ea1t ti\u1ec1n th\u1ed1ng nh\u1ea5t qu\u1ed1c gia)<\/strong>, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <strong>Ren SAE (Hi\u1ec7p h\u1ed9i K\u1ef9 s\u01b0 \u00d4 t\u00f4)<\/strong>. B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y li\u1ec7t k\u00ea m\u1ed9t s\u1ed1 k\u00edch th\u01b0\u1edbc ren th\u1eb3ng SAE ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho comm.<br>\u0110\u1ecbnh d\u1ea1ng k\u00fd hi\u1ec7u ti\u00eau chu\u1ea9n cho ren th\u1eb3ng ki\u1ec3u M\u1ef9 l\u00e0:<br><strong>K\u00edch th\u01b0\u1edbc \u2013 S\u1ed1 ren tr\u00ean inch \u2013 D\u00f2ng s\u1ea3n ph\u1ea9m<\/strong><br>V\u00ed d\u1ee5: <strong>3\/4\u201316 LHQ\/UNF<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-flexible-table-block-table is-content-justification-center\"><table class=\"has-fixed-layout\" style=\"min-width:125%\"><tbody><tr><td colspan=\"6\">Ren th\u1eb3ng ti\u00eau chu\u1ea9n M\u1ef9<br>SAE = UN = UNF<\/td><\/tr><tr><td rowspan=\"2\">K\u00edch th\u01b0\u1edbc ren<\/td><td rowspan=\"2\">S\u1ed1 s\u1ee3i tr\u00ean inch<br>(TPI)<\/td><td colspan=\"3\">\u0110\u01b0\u1eddng k\u00ednh s\u1ee3i<br>(mm)<\/td><td rowspan=\"2\">G\u00f3c ren<\/td><\/tr><tr><td>\u0110\u01b0\u1eddng k\u00ednh l\u1edbn<\/td><td>\u0110\u01b0\u1eddng k\u00ednh c\u01a1 b\u1ea3n<\/td><td>\u0110\u01b0\u1eddng k\u00ednh nh\u1ecf<\/td><\/tr><tr><td>5\/16<\/td><td>24<\/td><td>7.938<\/td><td>7.249<\/td><td>6.792<\/td><td rowspan=\"7\">60\u00b0<\/td><\/tr><tr><td>7\/16<\/td><td>20<\/td><td>11.113<\/td><td>10.287<\/td><td>9.738<\/td><\/tr><tr><td>1\/2<\/td><td>20<\/td><td>12.7<\/td><td>11.875<\/td><td>11.325<\/td><\/tr><tr><td>9\/16<\/td><td>18<\/td><td>14.288<\/td><td>13.325<\/td><td>12.559<\/td><\/tr><tr><td>3\/4<\/td><td>16<\/td><td>19.05<\/td><td>18.019<\/td><td>17.331<\/td><\/tr><tr><td>1-1\/16<\/td><td>12<\/td><td>26.988<\/td><td>25.613<\/td><td>24.695<\/td><\/tr><tr><td>1-5\/16<\/td><td>12<\/td><td>33.338<\/td><td>31.963<\/td><td>31.046<\/td><\/tr><tr><td colspan=\"6\">K\u00edch th\u01b0\u1edbc - TPI - D\u00f2ng s\u1ea3n ph\u1ea9m<br>V\u00ed d\u1ee5: 3\/4-16 UN\/UNF<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-d-2-american-tapered-threads-npt-nptf\">d-2. Ren c\u00f4n ki\u1ec3u M\u1ef9 (NPT \/ NPTF)<\/h4>\n\n\n\n<p>Ren NPT (National Pipe Taper), tr\u01b0\u1edbc \u0111\u00e2y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Ren \u1ed1ng c\u00f4n theo Ti\u00eau chu\u1ea9n Qu\u1ed1c gia Hoa K\u1ef3, l\u00e0 m\u1ed9t trong nh\u1eefng ti\u00eau chu\u1ea9n ren c\u00f4n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t t\u1ea1i Hoa K\u1ef3.<\/p>\n\n\n\n<p>Ren NPTF (Dryseal), c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ren \u1ed1ng c\u00f4n ti\u00eau chu\u1ea9n M\u1ef9 (Dryseal), \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ea1o \u0111\u1ed9 k\u00edn kh\u00edt cao h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u l\u00e0m k\u00edn b\u1ed5 sung. M\u1eb7c d\u00f9 kh\u00f4ng \u0111\u01b0\u1ee3c Hi\u1ec7p h\u1ed9i N\u0103ng l\u01b0\u1ee3ng Th\u1ee7y l\u1ef1c Qu\u1ed1c gia (NFPA) ch\u00ednh th\u1ee9c khuy\u1ebfn ngh\u1ecb, lo\u1ea1i ren n\u00e0y v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p kh\u00e1c nhau.<\/p>\n\n\n\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa ren NPT v\u00e0 ren NPTF n\u1eb1m \u1edf thi\u1ebft k\u1ebf \u0111\u1ec9nh v\u00e0 \u0111\u00e1y ren. Ren NPT kh\u00f4ng t\u1ea1o ra l\u1edbp k\u00edn ho\u00e0n h\u1ea3o gi\u1eefa c\u00e1c b\u1ec1 m\u1eb7t kim lo\u1ea1i t\u1ea1i \u0111\u1ec9nh ren, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng r\u00f2 r\u1ec9 nh\u1eb9 sau khi l\u1eafp r\u00e1p. Do \u0111\u00f3, th\u01b0\u1eddng c\u1ea7n s\u1eed d\u1ee5ng c\u00e1c v\u1eadt li\u1ec7u l\u00e0m k\u00edn nh\u01b0 b\u0103ng PTFE ho\u1eb7c ch\u1ea5t l\u00e0m k\u00edn. Ng\u01b0\u1ee3c l\u1ea1i, ren NPTF \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ea1o ra \u201cl\u1edbp k\u00edn kh\u00f4\u201d th\u00f4ng qua s\u1ef1 can thi\u1ec7p c\u00f3 ki\u1ec3m so\u00e1t.<\/p>\n\n\n\n<p><strong>\u0110\u1ecbnh d\u1ea1ng t\u00ean g\u1ecdi:<\/strong><br>K\u00edch th\u01b0\u1edbc \u2013 S\u1ed1 ren tr\u00ean inch \u2013 D\u00f2ng s\u1ea3n ph\u1ea9m<br>v\u00ed d\u1ee5:, <strong>1\/4\u201318 NPT<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-flexible-table-block-table is-content-justification-center is-scroll-on-mobile\"><table class=\"has-fixed-layout\" style=\"min-width:125%\"><tbody><tr><td colspan=\"6\"><strong>Ren c\u00f4n ti\u00eau chu\u1ea9n M\u1ef9<\/strong><br><strong>NPT \/ NPTF<\/strong><\/td><\/tr><tr><td rowspan=\"2\">K\u00edch th\u01b0\u1edbc ren<\/td><td rowspan=\"2\">S\u1ed1 s\u1ee3i tr\u00ean inch<br>(TPI)<\/td><td colspan=\"3\">\u0110\u01b0\u1eddng k\u00ednh s\u1ee3i<br>(mm)<\/td><td rowspan=\"2\">G\u00f3c ren<\/td><\/tr><tr><td>\u0110\u01b0\u1eddng k\u00ednh l\u1edbn<\/td><td>\u0110\u01b0\u1eddng k\u00ednh c\u01a1 b\u1ea3n<\/td><td>\u0110\u01b0\u1eddng k\u00ednh nh\u1ecf<\/td><\/tr><tr><td>1\/16<\/td><td>27<\/td><td>7.894<\/td><td>7.142<\/td><td>6.398<\/td><td rowspan=\"10\">60\u00b0<\/td><\/tr><tr><td>1\/8<\/td><td>27<\/td><td>10.242<\/td><td>9.489<\/td><td>8.737<\/td><\/tr><tr><td>1\/4<\/td><td>18<\/td><td>13.616<\/td><td>12.487<\/td><td>11.358<\/td><\/tr><tr><td>3\/8<\/td><td>18<\/td><td>17.055<\/td><td>15.926<\/td><td>14.797<\/td><\/tr><tr><td>1\/2<\/td><td>14<\/td><td>21.224<\/td><td>19.772<\/td><td>18.321<\/td><\/tr><tr><td>3\/4<\/td><td>14<\/td><td>26.569<\/td><td>25.117<\/td><td>23.666<\/td><\/tr><tr><td>1<\/td><td>11.5<\/td><td>33.228<\/td><td>31.461<\/td><td>29.694<\/td><\/tr><tr><td>1-1\/4<\/td><td>11.5<\/td><td>41.985<\/td><td>40.218<\/td><td>38.454<\/td><\/tr><tr><td>1-1\/2<\/td><td>11<\/td><td>48.054<\/td><td>46.287<\/td><td>44.52<\/td><\/tr><tr><td>2<\/td><td>11<\/td><td>60.092<\/td><td>58.325<\/td><td>56.558<\/td><\/tr><tr><td colspan=\"6\">K\u00edch th\u01b0\u1edbc - TPI - D\u00f2ng s\u1ea3n ph\u1ea9m<br>v\u00ed d\u1ee5: 1\/4-18 NPT<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-d-3-british-straight-threads-bspp-bsp-pf-g\">d-3. Ren th\u1eb3ng Anh (BSPP = BSP = PF = G)<\/h4>\n\n\n\n<p>C\u00e1c ti\u00eau chu\u1ea9n ren c\u1ee7a Anh do Vi\u1ec7n Ti\u00eau chu\u1ea9n Anh (BSI) ban h\u00e0nh. C\u00e1c t\u00ean g\u1ecdi ph\u1ed5 bi\u1ebfn nh\u1ea5t cho c\u00e1c lo\u1ea1i ren th\u1eb3ng c\u1ee7a Anh bao g\u1ed3m ren G, BSPP (British Standard Pipe Parallel), BSPM v\u00e0 BSP.<\/p>\n\n\n\n<p>Thu\u1eadt ng\u1eef BSPF (British Standard Pipe Fitting) l\u00e0 m\u1ed9t t\u00ean g\u1ecdi c\u0169 c\u1ee7a ren BSPP. Thu\u1eadt ng\u1eef n\u00e0y \u0111\u01b0\u1ee3c \u0111\u01b0a ra nh\u1eb1m gi\u1ea3m b\u1edbt s\u1ef1 nh\u1ea7m l\u1eabn gi\u1eefa BSPP (ren song song) v\u00e0 BSPT (ren c\u00f4n) trong c\u00e1c \u1ee9ng d\u1ee5ng tr\u01b0\u1edbc \u0111\u00e2y.<\/p>\n\n\n\n<p><strong>\u0110\u1ecbnh d\u1ea1ng t\u00ean g\u1ecdi:<\/strong><br><strong>Lo\u1ea1t - K\u00edch th\u01b0\u1edbc - S\u1ed1 ren tr\u00ean inch (TPI)<\/strong><br>v\u00ed d\u1ee5:, <strong>G 1\/8-28<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-flexible-table-block-table is-content-justification-center\"><table class=\"has-fixed-layout\" style=\"min-width:125%\"><tbody><tr><td colspan=\"6\">Ren song song theo Ti\u00eau chu\u1ea9n Anh<br>BSPP = BSP = PF = G<\/td><\/tr><tr><td rowspan=\"2\">K\u00edch th\u01b0\u1edbc ren<\/td><td rowspan=\"2\">S\u1ed1 s\u1ee3i tr\u00ean inch<br>(TPI)<\/td><td colspan=\"3\">\u0110\u01b0\u1eddng k\u00ednh s\u1ee3i<br>(mm)<\/td><td rowspan=\"2\">G\u00f3c ren<\/td><\/tr><tr><td>\u0110\u01b0\u1eddng k\u00ednh l\u1edbn<\/td><td>\u0110\u01b0\u1eddng k\u00ednh c\u01a1 b\u1ea3n<\/td><td>\u0110\u01b0\u1eddng k\u00ednh nh\u1ecf<\/td><\/tr><tr><td>1\/16<\/td><td>28<\/td><td>7.732<\/td><td>7.142<\/td><td>6.561<\/td><td rowspan=\"14\">55\u00b0<\/td><\/tr><tr><td>1\/8<\/td><td>28<\/td><td>9.782<\/td><td>9.147<\/td><td>8.566<\/td><\/tr><tr><td>1\/4<\/td><td>19<\/td><td>13.157<\/td><td>12.301<\/td><td>11.455<\/td><\/tr><tr><td>3\/8<\/td><td>19<\/td><td>16.662<\/td><td>15.806<\/td><td>14.95<\/td><\/tr><tr><td>1\/2<\/td><td>14<\/td><td>20.955<\/td><td>19.793<\/td><td>18.631<\/td><\/tr><tr><td>5\/8<\/td><td>14<\/td><td>22.911<\/td><td>21.749<\/td><td>20.587<\/td><\/tr><tr><td>3\/4<\/td><td>14<\/td><td>26.441<\/td><td>25.279<\/td><td>24.117<\/td><\/tr><tr><td>7\/8<\/td><td>14<\/td><td>30.201<\/td><td>29.039<\/td><td>27.877<\/td><\/tr><tr><td>1<\/td><td>11<\/td><td>33.249<\/td><td>31.77<\/td><td>30.291<\/td><\/tr><tr><td>1-1\/8<\/td><td>11<\/td><td>37.897<\/td><td>36.418<\/td><td>34.939<\/td><\/tr><tr><td>1-1\/4<\/td><td>11<\/td><td>41.91<\/td><td>40.431<\/td><td>38.952<\/td><\/tr><tr><td>1-1\/2<\/td><td>11<\/td><td>47.803<\/td><td>46.324<\/td><td>44.845<\/td><\/tr><tr><td>1-3\/4<\/td><td>11<\/td><td>53.746<\/td><td>52.267<\/td><td>50.788<\/td><\/tr><tr><td>2<\/td><td>11<\/td><td>59.614<\/td><td>58.135<\/td><td>56.656<\/td><\/tr><tr><td colspan=\"6\">Lo\u1ea1t - K\u00edch th\u01b0\u1edbc - S\u1ed1 ren tr\u00ean inch (TPI)<br>v\u00ed d\u1ee5: G 1\/8-28<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-d-4-british-tapered-threads-bspt-pt-r-rc-zg\">d-4. Ren c\u00f4n Anh (BSPT = PT = R = RC = ZG)<\/h4>\n\n\n\n<p>Ren c\u00f4n ki\u1ec3u Anh th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi t\u1eaft l\u00e0 BSPT (British Standard Pipe Taper). Trong c\u00e1c ti\u00eau chu\u1ea9n hi\u1ec7n \u0111\u1ea1i, k\u00fd hi\u1ec7u \u201cR\u201d ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i, m\u1eb7c d\u00f9 BSPT v\u1eabn l\u00e0 thu\u1eadt ng\u1eef \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn r\u1ed9ng r\u00e3i v\u00e0 v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong ng\u00e0nh c\u00f4ng nghi\u1ec7p.<\/p>\n\n\n\n<p><strong>\u0110\u1ecbnh d\u1ea1ng t\u00ean g\u1ecdi:<\/strong><br><strong>Lo\u1ea1t - K\u00edch th\u01b0\u1edbc - S\u1ed1 ren tr\u00ean inch (TPI)<\/strong><br>v\u00ed d\u1ee5:, <strong>R 1\/2-14<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-flexible-table-block-table is-content-justification-center\"><table class=\"has-fixed-layout\" style=\"min-width:125%\"><tbody><tr><td colspan=\"6\"> Ti\u00eau chu\u1ea9n Anh v\u1ec1 ren c\u00f4n<br>BSPT = PT = R = RC = ZG<\/td><\/tr><tr><td rowspan=\"2\">K\u00edch th\u01b0\u1edbc ren<\/td><td rowspan=\"2\">S\u1ed1 s\u1ee3i tr\u00ean inch<br>(TPI)<\/td><td colspan=\"3\">\u0110\u01b0\u1eddng k\u00ednh s\u1ee3i<br>(mm)<\/td><td rowspan=\"2\">G\u00f3c ren<\/td><\/tr><tr><td>\u0110\u01b0\u1eddng k\u00ednh l\u1edbn<\/td><td>\u0110\u01b0\u1eddng k\u00ednh c\u01a1 b\u1ea3n<\/td><td>\u0110\u01b0\u1eddng k\u00ednh nh\u1ecf<\/td><\/tr><tr><td>1\/16<\/td><td>28<\/td><td>7.723<\/td><td>7.142<\/td><td>6.561<\/td><td rowspan=\"10\">55\u00b0<\/td><\/tr><tr><td>1\/8<\/td><td>28<\/td><td>9.728<\/td><td>9.147<\/td><td>8.566<\/td><\/tr><tr><td>1\/4<\/td><td>19<\/td><td>13.157<\/td><td>12.3<\/td><td>11.445<\/td><\/tr><tr><td>3\/8<\/td><td>19<\/td><td>16.662<\/td><td>15.81<\/td><td>14.95<\/td><\/tr><tr><td>1\/2<\/td><td>14<\/td><td>20.995<\/td><td>19.79<\/td><td>18.631<\/td><\/tr><tr><td>3\/4<\/td><td>14<\/td><td>26.441<\/td><td>25.28<\/td><td>24.117<\/td><\/tr><tr><td>1<\/td><td>11<\/td><td>33.249<\/td><td>31.77<\/td><td>30.291<\/td><\/tr><tr><td>1-1\/4<\/td><td>11<\/td><td>41.91<\/td><td>40.43<\/td><td>38.952<\/td><\/tr><tr><td>1-1\/2<\/td><td>11<\/td><td>47.803<\/td><td>46.32<\/td><td>44.845<\/td><\/tr><tr><td>2<\/td><td>11<\/td><td>59.641<\/td><td>58.14<\/td><td>56.656<\/td><\/tr><tr><td colspan=\"6\">Lo\u1ea1t - K\u00edch th\u01b0\u1edbc - S\u1ed1 ren tr\u00ean inch (TPI)<br>v\u00ed d\u1ee5: R 1\/2-14<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-d-5-iso-metric-threads-m\">d-5. Ren m\u00e9t ISO (M)<\/h4>\n\n\n\n<p>Ren m\u00e9t theo ti\u00eau chu\u1ea9n ISO l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i ren \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn r\u1ed9ng r\u00e3i nh\u1ea5t v\u00e0 \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n h\u00f3a tr\u00ean ph\u1ea1m vi qu\u1ed1c t\u1ebf. Ti\u00eau chu\u1ea9n ISO 68-1 quy \u0111\u1ecbnh c\u00e1c nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf c\u01a1 b\u1ea3n c\u1ee7a ren m\u00e9t. Lo\u1ea1i ren n\u00e0y c\u00f3 h\u00ecnh d\u1ea1ng ch\u1eef V v\u1edbi g\u00f3c ren 60\u00b0, v\u00e0 c\u1ea3 ren trong l\u1eabn ren ngo\u00e0i \u0111\u1ec1u song song.<\/p>\n\n\n\n<p>Ren m\u00e9t \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u b\u1eb1ng ch\u1eef c\u00e1i \u201cM\u201d. C\u00f3 hai lo\u1ea1i b\u01b0\u1edbc ren ch\u00ednh: b\u01b0\u1edbc ren th\u00f4 v\u00e0 b\u01b0\u1edbc ren m\u1ecbn. Ren th\u00f4 l\u00e0 lo\u1ea1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u00e0 tu\u00e2n theo c\u00e1c gi\u00e1 tr\u1ecb b\u01b0\u1edbc ren ti\u00eau chu\u1ea9n, trong khi ren m\u1ecbn c\u00f3 k\u00edch th\u01b0\u1edbc b\u01b0\u1edbc ren nh\u1ecf h\u01a1n.<\/p>\n\n\n\n<p>M\u00e3 hi\u1ec7u ren cho bi\u1ebft r\u00f5 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 b\u01b0\u1edbc ren. V\u00ed d\u1ee5:<br>M4 \u00d7 0,5 c\u00f3 ngh\u0129a l\u00e0 ren c\u00f3 \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a l\u00e0 4 mm v\u00e0 b\u01b0\u1edbc ren l\u00e0 0,5 mm.<\/p>\n\n\n\n<p>N\u1ebfu kh\u00f4ng ch\u1ec9 \u0111\u1ecbnh b\u01b0\u1edbc ren, ng\u01b0\u1eddi ta s\u1ebd coi \u0111\u00f3 l\u00e0 b\u01b0\u1edbc ren th\u00f4 ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong ti\u00eau chu\u1ea9n ISO 261 \/ ISO 262. V\u00ed d\u1ee5, k\u00fd hi\u1ec7u M8 ng\u1ee5 \u00fd ren th\u00f4. T\u01b0\u01a1ng t\u1ef1, n\u1ebfu ch\u1ec9 ghi M20, ng\u01b0\u1eddi ta s\u1ebd hi\u1ec3u \u0111\u00f3 l\u00e0 ren c\u00f3 b\u01b0\u1edbc ren th\u00f4.<\/p>\n\n\n\n<p><strong>\u0110\u1ecbnh d\u1ea1ng t\u00ean g\u1ecdi:<\/strong><br><strong>K\u00edch th\u01b0\u1edbc \u00d7 Kho\u1ea3ng c\u00e1ch<\/strong><br>v\u00ed d\u1ee5:, <strong>M14 \u00d7 1,5<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-flexible-table-block-table is-content-justification-center\"><table class=\"has-fixed-layout\" style=\"min-width:125%\"><tbody><tr><td colspan=\"6\"><strong>Ren m\u00e9t ISO<\/strong><br><strong>M<\/strong><\/td><\/tr><tr><td rowspan=\"2\">K\u00edch th\u01b0\u1edbc ren<\/td><td rowspan=\"2\">\u0110\u1ed9 cao<\/td><td colspan=\"3\">\u0110\u01b0\u1eddng k\u00ednh s\u1ee3i<br>(mm)<\/td><td rowspan=\"2\">G\u00f3c ren<\/td><\/tr><tr><td>\u0110\u01b0\u1eddng k\u00ednh l\u1edbn<\/td><td>\u0110\u01b0\u1eddng k\u00ednh c\u01a1 b\u1ea3n<\/td><td>\u0110\u01b0\u1eddng k\u00ednh nh\u1ecf<\/td><\/tr><tr><td>M6<\/td><td rowspan=\"3\">1<\/td><td>6<\/td><td>5.35<\/td><td>4.917<\/td><td rowspan=\"14\">60\u00b0<\/td><\/tr><tr><td>M8<\/td><td>8<\/td><td>7.35<\/td><td>6.917<\/td><\/tr><tr><td>M10<\/td><td>10<\/td><td>9.35<\/td><td>8.917<\/td><\/tr><tr><td>M12<\/td><td rowspan=\"7\">1.5<\/td><td>12<\/td><td>11.03<\/td><td>10.376<\/td><\/tr><tr><td>M14<\/td><td>14<\/td><td>13.03<\/td><td>12.376<\/td><\/tr><tr><td>M16<\/td><td>16<\/td><td>15.03<\/td><td>14.376<\/td><\/tr><tr><td>M18<\/td><td>18<\/td><td>17.03<\/td><td>16.376<\/td><\/tr><tr><td>M20<\/td><td>20<\/td><td>19.03<\/td><td>18.376<\/td><\/tr><tr><td>M22<\/td><td>22<\/td><td>21.03<\/td><td>20.376<\/td><\/tr><tr><td>M24<\/td><td>24<\/td><td>23.03<\/td><td>22.376<\/td><\/tr><tr><td>M27<\/td><td rowspan=\"4\">2<\/td><td>27<\/td><td>25.7<\/td><td>24.835<\/td><\/tr><tr><td>M30<\/td><td>30<\/td><td>28.7<\/td><td>27.835<\/td><\/tr><tr><td>M33<\/td><td>33<\/td><td>31.7<\/td><td>30.835<\/td><\/tr><tr><td>M36<\/td><td>36<\/td><td>34.7<\/td><td>33.835<\/td><\/tr><tr><td colspan=\"6\">K\u00edch th\u01b0\u1edbc \u00d7 Kho\u1ea3ng c\u00e1ch<br>v\u00ed d\u1ee5: M 14 x 1,5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-cc01db23c1bba5003aa4f8baecabc978\" id=\"h-5-four-steps-to-identify-thread-specifications\"><span class=\"ez-toc-section\" id=\"5-four-steps-to-identify-thread-specifications\"><\/span>5. B\u1ed1n b\u01b0\u1edbc \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a s\u1ee3i<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-flexible-table-block-table is-content-justification-center\"><table class=\"has-fixed-layout\" style=\"min-width:125%\"><tbody><tr><td rowspan=\"2\">Ti\u00eau chu\u1ea9n s\u1ee3i<\/td><td>B\u01b0\u1edbc 1<\/td><td>B\u01b0\u1edbc 2<\/td><td>B\u01b0\u1edbc 3<\/td><td>B\u01b0\u1edbc 4<\/td><\/tr><tr><td>X\u00e1c \u0111\u1ecbnh lo\u1ea1i ren<\/td><td>X\u00e1c \u0111\u1ecbnh b\u01b0\u1edbc ren<\/td><td>X\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc c\u1ee7a ren<\/td><td>X\u00e1c \u0111\u1ecbnh ti\u00eau chu\u1ea9n ren<\/td><\/tr><tr><td>Ren th\u1eb3ng ti\u00eau chu\u1ea9n M\u1ef9 (SAE=UN=UNF)<\/td><td>Song song<\/td><td>12, 14, 16<br>18, 20, 24<\/td><td rowspan=\"5\">S\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o l\u01b0\u1eddng:<br>Th\u01b0\u1edbc k\u1eb9p Vernier<br>Th\u01b0\u1edbc k\u1eb9p<br>Th\u01b0\u1edbc k\u1eb9p \u0111i\u1ec7n t\u1eed<\/td><td>K\u00edch th\u01b0\u1edbc - TPI - D\u00f2ng s\u1ea3n ph\u1ea9m<br>v\u00ed d\u1ee5: 3\/4-16 UN<\/td><\/tr><tr><td>Ren c\u00f4n ti\u00eau chu\u1ea9n M\u1ef9<br>(NPT \/ NPTF)<\/td><td>H\u00ecnh n\u00f3n<\/td><td>11-1\/2, 14<br>18, 27<\/td><td>K\u00edch th\u01b0\u1edbc - TPI - D\u00f2ng s\u1ea3n ph\u1ea9m<br>v\u00ed d\u1ee5: 1\/4-18 NPT<\/td><\/tr><tr><td>Ren song song ti\u00eau chu\u1ea9n Anh (BSPP=BSP=PF=G)<\/td><td>Song song<\/td><td>11, 14<br>19, 28<\/td><td>Lo\u1ea1t - K\u00edch th\u01b0\u1edbc - TPI<br>v\u00ed d\u1ee5: G 1\/8-28<\/td><\/tr><tr><td>Ti\u00eau chu\u1ea9n ren c\u00f4n Anh (BSPT=PT=R=RC=ZG)<\/td><td>H\u00ecnh n\u00f3n<\/td><td>11, 14<br>19, 28<\/td><td>Lo\u1ea1t - K\u00edch th\u01b0\u1edbc - TPI<br>v\u00ed d\u1ee5: R 1\/2-14<\/td><\/tr><tr><td>Ren m\u00e9t ti\u00eau chu\u1ea9n ISO M<\/td><td>Song song<\/td><td>1.0, 1.5, 2.0<\/td><td>Lo\u1ea1t - K\u00edch th\u01b0\u1edbc x Kho\u1ea3ng c\u00e1ch<br>v\u00ed d\u1ee5: M 14 x 1,5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>B\u00e2y gi\u1edd b\u1ea1n \u0111\u00e3 bi\u1ebft c\u00e1ch ch\u1ecdn lo\u1ea1i v\u00e0 k\u00edch th\u01b0\u1edbc ch\u1ec9, b\u1ea1n c\u00f3 th\u1eafc m\u1eafc v\u1ec1 c\u00e1ch l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb kh\u00f4ng? H\u00e3y nh\u1ea5p v\u00e0o li\u00ean k\u1ebft b\u00ean d\u01b0\u1edbi \u0111\u1ec3 t\u00ecm hi\u1ec3u v\u1ec1 quy tr\u00ecnh l\u1eafp \u0111\u1eb7t v\u00e0 c\u00e1c l\u01b0u \u00fd li\u00ean quan!<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Top Six Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1 c\u1ee7a thi\u1ebft b\u1ecb ch\u1ecbu \u00e1p l\u1ef1c<\/li>\n\n\n\n<li>C\u00e1c \u0111i\u1ec3m an to\u00e0n quan tr\u1ecdng khi l\u1eafp \u0111\u1eb7t \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t<\/li>\n<\/ul>\n\n\n\n<p><strong>T\u00edn d\u1ee5ng v\u00e0 Tham chi\u1ebfu:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ASME: Ren \u1ed1ng, M\u1ee5c \u0111\u00edch chung, \u0110\u01a1n v\u1ecb inch<\/li>\n\n\n\n<li>ISO 68-1:1998(en) Ti\u00eau chu\u1ea9n ISO v\u1ec1 ren \u1ed1c v\u00edt th\u00f4ng d\u1ee5ng \u2014 H\u00ecnh d\u1ea1ng c\u01a1 b\u1ea3n \u2014 Ph\u1ea7n 1: Ren \u1ed1c v\u00edt m\u00e9t<\/li>\n\n\n\n<li>ISO\/DIS 6149-1(en) K\u1ebft n\u1ed1i cho h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c v\u00e0 s\u1eed d\u1ee5ng chung \u2014 C\u1ed5ng v\u00e0 \u0111\u1ea7u bulong c\u00f3 ren m\u00e9t ISO 261 v\u00e0 gio\u0103ng O-ring \u2014 Ph\u1ea7n 1: C\u1ed5ng c\u00f3 v\u1ecf c\u1eaft ng\u1eafn cho gio\u0103ng O-ring<\/li>\n\n\n\n<li>ISO 262:1998 Ti\u00eau chu\u1ea9n ISO v\u1ec1 ren \u1ed1c v\u00edt m\u00e9t ti\u00eau chu\u1ea9n \u2014 K\u00edch th\u01b0\u1edbc \u0111\u01b0\u1ee3c ch\u1ecdn cho \u1ed1c v\u00edt, bu l\u00f4ng v\u00e0 \u0111ai \u1ed1c<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>B\u1ea1n c\u00f3 c\u1ea3m th\u1ea5y b\u1ed1i r\u1ed1i tr\u01b0\u1edbc c\u00e1c thu\u1eadt ng\u1eef nh\u01b0 \u201cren\u201d, \u201cren v\u00edt\u201d, \u201ck\u1ebft n\u1ed1i\u201d hay \u201cph\u1ee5 ki\u1ec7n\u201d, c\u0169ng nh\u01b0 tr\u01b0\u1edbc s\u1ef1 \u0111a d\u1ea1ng c\u1ee7a c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt hi\u1ec7n c\u00f3? SJ Gauge cung c\u1ea5p b\u1ed1n lo\u1ea1i k\u1ebft n\u1ed1i ren ch\u00ednh: NPT, PT, G v\u00e0 M. B\u1ea1n \u0111ang b\u0103n kho\u0103n kh\u00f4ng bi\u1ebft l\u1ef1a ch\u1ecdn n\u00e0o ph\u00f9 h\u1ee3p nh\u1ea5t v\u1edbi y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a \u1ee9ng d\u1ee5ng c\u1ee7a m\u00ecnh? Trong b\u00e0i vi\u1ebft sau \u0111\u00e2y, ch\u00fang t\u00f4i s\u1ebd cung c\u1ea5p [\u2026]<\/p>","protected":false},"author":2,"featured_media":2438,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[73],"class_list":["post-2407","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-knowledge"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Introduction to Common Thread Standards for Industrial Instruments: Four Steps to Identify Thread Specifications! - SJ Gauge | Pressure Gauges, Thermometers &amp; Pressure Sensors<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sj-gauge.com\/vi\/thread-standards-identification\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Introduction to Common Thread Standards for Industrial Instruments: Four Steps to Identify Thread Specifications!\" \/>\n<meta property=\"og:description\" content=\"Are you confused by common terms such as \u201cthread,\u201d \u201cscrew thread,\u201d \u201cconnection,\u201d or \u201cfitting,\u201d as well as the wide range of specifications available? 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