{"id":7404,"date":"2025-08-07T04:55:11","date_gmt":"2025-08-06T20:55:11","guid":{"rendered":"https:\/\/xzfastener.com\/?p=7404"},"modified":"2026-06-24T04:56:18","modified_gmt":"2026-06-23T20:56:18","slug":"how-to-read-bolt-head-markings-and-strength-grade-codes","status":"publish","type":"post","link":"https:\/\/xzfastener.com\/vi\/how-to-read-bolt-head-markings-and-strength-grade-codes\/","title":{"rendered":"C\u00e1ch \u0111\u1ecdc k\u00fd hi\u1ec7u \u0111\u1ea7u bu l\u00f4ng v\u00e0 m\u00e3 c\u1ea5p \u0111\u1ed9 b\u1ec1n"},"content":{"rendered":"<p>D\u1ea5u hi\u1ec7u \u0111\u1ea7u bu l\u00f4ng v\u00e0 m\u00e3 c\u1ea5p \u0111\u1ed9 b\u1ec1n th\u01b0\u1eddng b\u1ecb b\u1ecf qua trong qu\u00e1 tr\u00ecnh mua s\u1eafm, tuy nhi\u00ean ch\u00fang l\u00e0 m\u1ed9t trong nh\u1eefng d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft quan tr\u1ecdng nh\u1ea5t v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a chi ti\u1ebft si\u1ebft ch\u1eb7t. Trong th\u1ef1c t\u1ebf c\u00f4ng nghi\u1ec7p, nh\u1eefng d\u1ea5u hi\u1ec7u n\u00e0y cho b\u1ea1n bi\u1ebft nhi\u1ec1u \u0111i\u1ec1u h\u01a1n l\u00e0 m\u1ed9t b\u1ea3ng d\u1eef li\u1ec7u\u2014 ch\u00fang ti\u1ebft l\u1ed9 ti\u00eau chu\u1ea9n, lo\u1ea1i v\u1eadt li\u1ec7u v\u00e0 kh\u1ea3 n\u0103ng \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<p>Hi\u1ec3u \u0111\u00fang s\u1ebd gi\u00fap ng\u0103n ch\u1eb7n vi\u1ec7c thay th\u1ebf sai, l\u1eafp \u0111\u1eb7t kh\u00f4ng an to\u00e0n v\u00e0 l\u1eafp r\u00e1p kh\u00f4ng kh\u1edbp.<\/p>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi bu l\u00f4ng, \u0111ai \u1ed1c v\u00e0 \u1ed1c v\u00edt c\u01b0\u1eddng \u0111\u1ed9 cao ti\u00eau chu\u1ea9n, ng\u01b0\u1eddi mua c\u00f3 th\u1ec3 xem x\u00e9t XZ Fastener's <a href=\"https:\/\/xzfastener.com\/vi\/products-category\/standard-fasteners\/\">\u1ed1c v\u00edt ti\u00eau chu\u1ea9n<\/a> v\u00e0 <a href=\"https:\/\/xzfastener.com\/vi\/products-category\/high-strength-fasteners\/\">\u1ed1c v\u00edt c\u01b0\u1eddng \u0111\u1ed9 cao<\/a> trang.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ea1i sao d\u1ea5u \u0111\u1ea7u bu l\u00f4ng l\u1ea1i quan tr\u1ecdng<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Nh\u1eadn d\u1ea1ng, kh\u00f4ng trang tr\u00ed<\/h3>\n\n\n\n<p>D\u1ea5u hi\u1ec7u \u0111\u1ea7u bu l\u00f4ng kh\u00f4ng ph\u1ea3i l\u00e0 bi\u1ec3u t\u01b0\u1ee3ng ng\u1eabu nhi\u00ean. Ch\u00fang l\u00e0 nh\u1eefng m\u00e3 \u0111\u1ecbnh danh \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n h\u00f3a d\u00f9ng \u0111\u1ec3 x\u00e1c nh\u1eadn vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf nh\u01b0 ISO, DIN, ASTM, ho\u1eb7c h\u1ec7 th\u1ed1ng nh\u00e0 s\u1ea3n xu\u1ea5t c\u1ee5 th\u1ec3.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Lo\u1ea1i \u0111\u00e1nh d\u1ea5u<\/th><th>\u00dd ngh\u0129a<\/th><\/tr><\/thead><tbody><tr><td>Logo nh\u00e0 s\u1ea3n xu\u1ea5t<\/td><td>X\u00e1c \u0111\u1ecbnh ngu\u1ed3n s\u1ea3n xu\u1ea5t<\/td><\/tr><tr><td>S\u1ed1 l\u1edbp<\/td><td>Cho bi\u1ebft l\u1edbp s\u1ee9c m\u1ea1nh<\/td><\/tr><tr><td>K\u00fd hi\u1ec7u chu\u1ea9n<\/td><td>X\u00e1c nh\u1eadn h\u1ec7 th\u1ed1ng tu\u00e2n th\u1ee7<\/td><\/tr><tr><td>M\u00e3 \u0111\u1eb7c bi\u1ec7t<\/td><td>C\u00f3 th\u1ec3 ch\u1ec9 ra lo\u1ea1i l\u1edbp ph\u1ee7 ho\u1eb7c h\u1ee3p kim<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>N\u1ebfu kh\u00f4ng gi\u1ea3i th\u00edch ch\u00ednh x\u00e1c, m\u1ed9t bu l\u00f4ng c\u00f3 th\u1ec3 gi\u1ed1ng h\u1ec7t nhau v\u1ec1 m\u1eb7t h\u00ecnh \u1ea3nh nh\u01b0ng r\u1ea5t kh\u00e1c nhau v\u1ec1 m\u1eb7t c\u01a1 h\u1ecdc.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">H\u1ec7 th\u1ed1ng c\u1ea5p \u0111\u1ed9 s\u1ee9c m\u1ea1nh s\u1ed1 li\u1ec7u<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">H\u1ec7 th\u1ed1ng c\u00f4ng nghi\u1ec7p ph\u1ed5 bi\u1ebfn nh\u1ea5t tr\u00ean to\u00e0n th\u1ebf gi\u1edbi<\/h3>\n\n\n\n<p>Bu l\u00f4ng h\u1ec7 m\u00e9t th\u01b0\u1eddng s\u1eed d\u1ee5ng c\u00e1c d\u1ea5u hi\u1ec7u thu\u1ed9c t\u00ednh nh\u01b0 4.6, 8.8, 10.9, v\u00e0 12.9. Nh\u1eefng con s\u1ed1 n\u00e0y \u0111\u1ea1i di\u1ec7n cho m\u1ed1i quan h\u1ec7 \u0111\u1ed9 b\u1ec1n k\u00e9o v\u00e0 n\u0103ng su\u1ea5t.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>L\u1edbp<\/th><th>\u00dd ngh\u0129a<\/th><th>S\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th><\/tr><\/thead><tbody><tr><td>4.6<\/td><td>C\u01b0\u1eddng \u0111\u1ed9 th\u1ea5p<\/td><td>C\u00e1c t\u1ed5 h\u1ee3p h\u1ea1ng nh\u1eb9<\/td><\/tr><tr><td>8.8<\/td><td>C\u01b0\u1eddng \u0111\u1ed9 trung b\u00ecnh cao<\/td><td>M\u00e1y m\u00f3c v\u00e0 k\u1ebft c\u1ea5u t\u1ed5ng h\u1ee3p<\/td><\/tr><tr><td>10.9<\/td><td>C\u01b0\u1eddng \u0111\u1ed9 cao<\/td><td>M\u00e1y m\u00f3c h\u1ea1ng n\u1eb7ng v\u00e0 c\u00e1c kh\u1edbp n\u1ed1i ch\u1ecbu t\u1ea3i<\/td><\/tr><tr><td>12.9<\/td><td>S\u1ee9c m\u1ea1nh r\u1ea5t cao<\/td><td>\u1ee8ng d\u1ee5ng ch\u00ednh x\u00e1c v\u00e0 t\u1ea3i cao<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Theo c\u00e1ch gi\u1ea3i th\u00edch chung, s\u1ed1 \u0111\u1ea7u ti\u00ean bi\u1ec3u th\u1ecb m\u1ee9c \u0111\u1ed9 b\u1ec1n k\u00e9o v\u00e0 s\u1ed1 th\u1ee9 hai bi\u1ec3u th\u1ecb t\u1ef7 l\u1ec7 n\u0103ng su\u1ea5t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u0110\u00e1nh d\u1ea5u d\u1ef1a tr\u00ean inch (ASTM)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u1ed5 bi\u1ebfn trong c\u00e1c h\u1ec7 th\u1ed1ng k\u1ebft c\u1ea5u v\u00e0 \u00e1p l\u1ef1c<\/h3>\n\n\n\n<p>Trong c\u00e1c h\u1ec7 th\u1ed1ng ASTM, bu l\u00f4ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng m\u00e3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt thay v\u00ec ch\u1ec9 ph\u00e2n lo\u1ea1i b\u1eb1ng s\u1ed1.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>ASTM \u0110\u00e1nh d\u1ea5u<\/th><th>\u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th><\/tr><\/thead><tbody><tr><td>A307<\/td><td>Bu l\u00f4ng th\u00f4ng d\u1ee5ng<\/td><\/tr><tr><td>A325<\/td><td>K\u1ebft n\u1ed1i th\u00e9p k\u1ebft c\u1ea5u<\/td><\/tr><tr><td>A490<\/td><td>Bu l\u00f4ng k\u1ebft c\u1ea5u c\u01b0\u1eddng \u0111\u1ed9 cao<\/td><\/tr><tr><td>A193 B7<\/td><td>Bu l\u00f4ng stud ch\u1ecbu \u00e1p su\u1ea5t cao v\u00e0 nhi\u1ec7t \u0111\u1ed9 cao<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng lu\u1ed3ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng n\u00e0y, ng\u01b0\u1eddi mua c\u0169ng c\u00f3 th\u1ec3 tham kh\u1ea3o XZ Fastener's <a href=\"https:\/\/xzfastener.com\/vi\/products-tag\/threaded-rod\/\">thanh ren<\/a> th\u1ec3 lo\u1ea1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1ch \u0111\u1ecdc d\u1ea5u tr\u00ean \u0111\u1ea7u bu l\u00f4ng<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Nh\u00ecn v\u00e0o ba y\u1ebfu t\u1ed1 ch\u00ednh<\/h3>\n\n\n\n<p>D\u1ea5u \u0111\u1ea7u bu l\u00f4ng \u0111i\u1ec3n h\u00ecnh ch\u1ee9a ba l\u1edbp th\u00f4ng tin:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Nh\u1eadn d\u1ea1ng nh\u00e0 s\u1ea3n xu\u1ea5t.<\/li>\n\n\n\n<li>C\u1ea5p \u0111\u1ed9 b\u1ec1n ho\u1eb7c \u0111\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt.<\/li>\n\n\n\n<li>Truy xu\u1ea5t ngu\u1ed3n g\u1ed1c b\u1ed5 sung ho\u1eb7c m\u00e3 l\u00f4.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Khu v\u1ef1c \u0111\u00e1nh d\u1ea5u<\/th><th>Nh\u1eefng g\u00ec c\u1ea7n ki\u1ec3m tra<\/th><\/tr><\/thead><tbody><tr><td>Trung t\u00e2m \u0111\u1ea7u<\/td><td>C\u1ea5p \u0111\u1ed9 s\u1ee9c m\u1ea1nh (v\u00ed d\u1ee5: 8.8, 10.9)<\/td><\/tr><tr><td>K\u00fd hi\u1ec7u xung quanh<\/td><td>Nh\u00e0 s\u1ea3n xu\u1ea5t ID<\/td><\/tr><tr><td>\u0110i\u1ec3m b\u1ed5 sung<\/td><td>S\u1ed1 nhi\u1ec7t ho\u1eb7c m\u00e3 truy xu\u1ea5t ngu\u1ed3n g\u1ed1c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Trong th\u1ef1c t\u1ebf, nh\u1eefng d\u1ea5u hi\u1ec7u b\u1ecb thi\u1ebfu ho\u1eb7c kh\u00f4ng r\u00f5 r\u00e0ng l\u00e0 d\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o cho vi\u1ec7c ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nh\u1eefng hi\u1ec3u l\u1ea7m ph\u1ed5 bi\u1ebfn<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Sai s\u00f3t x\u1ea3y ra \u1edf c\u1ea5p \u0111\u1ed9 mua s\u1eafm<\/h3>\n\n\n\n<p>Nhi\u1ec1u v\u1ea5n \u0111\u1ec1 v\u1ec1 chi ti\u1ebft si\u1ebft ch\u1eb7t t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng xu\u1ea5t ph\u00e1t t\u1eeb vi\u1ec7c \u0111\u1ecdc sai ho\u1eb7c b\u1ecf qua c\u00e1c d\u1ea5u hi\u1ec7u tr\u00ean \u0111\u1ea7u.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>sai l\u1ea7m<\/th><th>R\u1ee7i ro<\/th><\/tr><\/thead><tbody><tr><td>Nh\u1ea7m l\u1eabn 8.8 v\u1edbi 8.0<\/td><td>L\u1ef1a ch\u1ecdn s\u1ee9c m\u1ea1nh sai<\/td><\/tr><tr><td>Gi\u1ea3 s\u1eed t\u1ea5t c\u1ea3 c\u00e1c bu l\u00f4ng m\u00e0u \u0111en \u0111\u1ec1u c\u00f3 \u0111\u1ed9 b\u1ec1n cao<\/td><td>Gi\u1ea3 \u0111\u1ecbnh v\u1eadt li\u1ec7u kh\u00f4ng ch\u00ednh x\u00e1c<\/td><\/tr><tr><td>B\u1ecf qua nh\u00e0 s\u1ea3n xu\u1ea5t<\/td><td>M\u1ea5t kh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c<\/td><\/tr><tr><td>Tr\u1ed9n h\u1ec7 th\u1ed1ng s\u1ed1 li\u1ec7u v\u00e0 ASTM<\/td><td>L\u1ed7i t\u01b0\u01a1ng th\u00edch<\/td><\/tr><tr><td>S\u1eed d\u1ee5ng bu l\u00f4ng kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u \u1edf c\u00e1c kh\u1edbp quan tr\u1ecdng<\/td><td>R\u1ee7i ro an to\u00e0n<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng bu l\u00f4ng kh\u00f4ng c\u00f3 d\u1ea5u th\u00edch h\u1ee3p trong c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu t\u1ea3i ho\u1eb7c y\u00eau c\u1ea7u an to\u00e0n cao.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">M\u00e3 s\u1ee9c m\u1ea1nh so v\u1edbi hi\u1ec7u su\u1ea5t th\u1ef1c s\u1ef1<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u00e1nh d\u1ea5u kh\u00f4ng ph\u1ea3i l\u00e0 to\u00e0n b\u1ed9 c\u00e2u chuy\u1ec7n<\/h3>\n\n\n\n<p>C\u1ea5p \u0111\u1ed9 b\u1ec1n cho bi\u1ebft hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc d\u1ef1 ki\u1ebfn trong \u0111i\u1ec1u ki\u1ec7n ti\u00eau chu\u1ea9n, nh\u01b0ng ho\u1ea1t \u0111\u1ed9ng th\u1ef1c t\u1ebf ph\u1ee5 thu\u1ed9c v\u00e0o x\u1eed l\u00fd nhi\u1ec7t, l\u1edbp ph\u1ee7, t\u00ecnh tr\u1ea1ng ren v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng l\u1eafp \u0111\u1eb7t.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Y\u1ebfu t\u1ed1<\/th><th>\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ee9c m\u1ea1nh<\/th><\/tr><\/thead><tbody><tr><td>X\u1eed l\u00fd nhi\u1ec7t<\/td><td>X\u00e1c \u0111\u1ecbnh t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc th\u1ef1c t\u1ebf<\/td><\/tr><tr><td>Ch\u1ea5t l\u01b0\u1ee3ng s\u1ee3i<\/td><td>\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 t\u1eadp trung \u1ee9ng su\u1ea5t<\/td><\/tr><tr><td>\u0111\u1ed9 d\u00e0y l\u1edbp ph\u1ee7<\/td><td>\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn m\u1ed1i quan h\u1ec7 m\u00f4-men xo\u1eafn-ti\u1ec1n t\u1ea3i<\/td><\/tr><tr><td>Lubrication<\/td><td>Thay \u0111\u1ed5i h\u00e0nh vi th\u1eaft ch\u1eb7t<\/td><\/tr><tr><td>Ph\u01b0\u01a1ng ph\u00e1p c\u00e0i \u0111\u1eb7t<\/td><td>T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn t\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a t\u1ea3i tr\u01b0\u1edbc<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 \u0111\u1ed9 b\u1ec1n cao, ng\u01b0\u1eddi mua c\u0169ng n\u00ean xem x\u00e9t XZ Fastener's <a href=\"https:\/\/xzfastener.com\/vi\/fastener-material\/carbon-steel\/\">\u1ed1c v\u00edt th\u00e9p carbon<\/a> v\u00e0 <a href=\"https:\/\/xzfastener.com\/vi\/fastener-material\/stainless-steel\/\">\u1ed1c v\u00edt b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1ch \u0111\u00e1nh d\u1ea5u \u0111\u1ea7u h\u1ed7 tr\u1ee3 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">H\u1eefu \u00edch cho vi\u1ec7c ki\u1ec3m tra v\u00e0 truy xu\u1ea5t ngu\u1ed3n g\u1ed1c<\/h3>\n\n\n\n<p>D\u1ea5u \u0111\u1ea7u bu l\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ki\u1ec3m tra \u0111\u1ea7u v\u00e0o, ki\u1ec3m so\u00e1t kho h\u00e0ng v\u00e0 x\u00e1c minh hi\u1ec7n tr\u01b0\u1eddng. Ch\u00fang gi\u00fap \u0111\u1ea3m b\u1ea3o r\u1eb1ng \u0111\u00fang lo\u1ea1i \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u1edf \u0111\u00fang v\u1ecb tr\u00ed.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Giai \u0111o\u1ea1n ki\u1ec3m so\u00e1t<\/th><th>Vai tr\u00f2 c\u1ee7a vi\u1ec7c \u0111\u00e1nh d\u1ea5u<\/th><\/tr><\/thead><tbody><tr><td>Ki\u1ec3m tra \u0111\u1ea7u v\u00e0o<\/td><td>X\u00e1c minh l\u1edbp v\u00e0 nh\u00e0 cung c\u1ea5p<\/td><\/tr><tr><td>Ph\u00e2n lo\u1ea1i kho<\/td><td>Ng\u0103n ch\u1eb7n s\u1ef1 tr\u1ed9n l\u1eabn c\u00e1c l\u1edbp<\/td><\/tr><tr><td>Installation<\/td><td>X\u00e1c nh\u1eadn vi\u1ec7c s\u1eed d\u1ee5ng chi ti\u1ebft si\u1ebft ch\u1eb7t \u0111\u00fang c\u00e1ch<\/td><\/tr><tr><td>Maintenance<\/td><td>X\u00e1c \u0111\u1ecbnh c\u00e1c b\u1ed9 ph\u1eadn thay th\u1ebf<\/td><\/tr><tr><td>Ph\u00e2n t\u00edch l\u1ed7i<\/td><td>Theo d\u00f5i l\u00f4 s\u1ea3n xu\u1ea5t<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Trong c\u00e1c d\u1ef1 \u00e1n c\u00f4ng nghi\u1ec7p, vi\u1ec7c truy xu\u1ea5t ngu\u1ed3n g\u1ed1c th\u01b0\u1eddng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u \u0111\u1ec3 ki\u1ec3m tra v\u00e0 tu\u00e2n th\u1ee7 an to\u00e0n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u01b0\u01a1ng t\u00e1c l\u1edbp ph\u1ee7 v\u00e0 \u0111\u00e1nh d\u1ea5u<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">B\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n kh\u00f4ng \u0111\u01b0\u1ee3c che gi\u1ea5u nh\u1eadn d\u1ea1ng<\/h3>\n\n\n\n<p>M\u1ed9t s\u1ed1 l\u1edbp ph\u1ee7 c\u00f3 th\u1ec3 che khu\u1ea5t c\u00e1c d\u1ea5u hi\u1ec7u ho\u1eb7c thay \u0111\u1ed5i kh\u1ea3 n\u0103ng \u0111\u1ecdc tr\u1ef1c quan. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi m\u1ea1 k\u1ebdm, m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng v\u00e0 ho\u00e0n thi\u1ec7n oxit \u0111en.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Lo\u1ea1i l\u1edbp ph\u1ee7<\/th><th>\u0110\u00e1nh d\u1ea5u kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb<\/th><\/tr><\/thead><tbody><tr><td>M\u1ea1 k\u1ebdm<\/td><td>N\u00f3i chung l\u00e0 r\u00f5 r\u00e0ng<\/td><\/tr><tr><td>Oxit \u0111en<\/td><td>\u0110\u1ed9 t\u01b0\u01a1ng ph\u1ea3n t\u1ed1t<\/td><\/tr><tr><td>M\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng<\/td><td>C\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m t\u1ea7m nh\u00ecn<\/td><\/tr><tr><td>L\u1edbp ph\u1ee7 v\u1ea3y k\u1ebdm<\/td><td>C\u00f3 th\u1ec3 che \u0111i m\u1ed9t ph\u1ea7n d\u1ea5u hi\u1ec7u<\/td><\/tr><tr><td>Bu l\u00f4ng s\u01a1n<\/td><td>Th\u01b0\u1eddng y\u00eau c\u1ea7u \u0111\u00e1nh d\u1ea5u l\u1ea1i<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng ph\u1ee7, xem XZ Fastener <a href=\"https:\/\/xzfastener.com\/vi\/products-category\/various-coated-fasteners\/\">\u1ed1c v\u00edt tr\u00e1ng kh\u00e1c nhau<\/a> v\u00e0 <a href=\"https:\/\/xzfastener.com\/vi\/fastener-coating\/hot-dip-galvanizing\/\">m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">RFQ Danh s\u00e1ch ki\u1ec3m tra d\u00e0nh cho ng\u01b0\u1eddi mua<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ea3m b\u1ea3o nh\u1eadn d\u1ea1ng ch\u00ednh x\u00e1c l\u1edbp tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng<\/h3>\n\n\n\n<p>M\u1ed9t RFQ th\u00edch h\u1ee3p n\u00ean bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ti\u00eau chu\u1ea9n bu l\u00f4ng (ISO, DIN, ASTM, v.v.).<\/li>\n\n\n\n<li>Y\u00eau c\u1ea7u v\u1ec1 c\u1ea5p \u0111\u1ed9 b\u1ec1n (8.8, 10.9, 12.9, v.v.).<\/li>\n\n\n\n<li>Y\u00eau c\u1ea7u \u0111\u00e1nh d\u1ea5u c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t n\u1ebfu c\u1ea7n.<\/li>\n\n\n\n<li>\u0110\u1eb7c \u0111i\u1ec3m v\u1eadt li\u1ec7u.<\/li>\n\n\n\n<li>Lo\u1ea1i l\u1edbp ph\u1ee7 v\u00e0 \u0111\u1ed9 d\u00e0y.<\/li>\n\n\n\n<li>Y\u00eau c\u1ea7u truy xu\u1ea5t ngu\u1ed3n g\u1ed1c ho\u1eb7c s\u1ed1 nhi\u1ec7t.<\/li>\n\n\n\n<li>Lo\u1ea1i \u1ee9ng d\u1ee5ng v\u00e0 \u0111i\u1ec1u ki\u1ec7n t\u1ea3i.<\/li>\n\n\n\n<li>Y\u00eau c\u1ea7u ki\u1ec3m tra v\u00e0 ch\u1ee9ng nh\u1eadn.<\/li>\n\n\n\n<li>Y\u00eau c\u1ea7u v\u1ec1 \u0111\u00f3ng g\u00f3i v\u00e0 ghi nh\u00e3n.<\/li>\n<\/ul>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ed1c v\u00edt t\u00f9y ch\u1ec9nh ho\u1eb7c d\u1ef1a tr\u00ean d\u1ef1 \u00e1n, h\u00e3y g\u1eedi b\u1ea3n v\u1ebd v\u00e0 y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt th\u00f4ng qua <a href=\"https:\/\/xzfastener.com\/vi\/home\/contact-us\/\">XZ Fastener Li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Khuy\u1ebfn ngh\u1ecb cu\u1ed1i c\u00f9ng<\/h2>\n\n\n\n<p>\u0110\u00e1nh d\u1ea5u \u0111\u1ea7u bu l\u00f4ng v\u00e0 m\u00e3 c\u1ea5p \u0111\u1ed9 b\u1ec1n l\u00e0 nh\u1eefng c\u00f4ng c\u1ee5 c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng c\u1ee7a chi ti\u1ebft si\u1ebft ch\u1eb7t v\u00e0 \u0111\u1ea3m b\u1ea3o l\u1ef1a ch\u1ecdn an to\u00e0n. Ch\u00fang n\u00ean \u0111\u01b0\u1ee3c \u0111\u1ecdc c\u00f9ng v\u1edbi c\u00e1c y\u00eau c\u1ea7u v\u1ec1 v\u1eadt li\u1ec7u, l\u1edbp ph\u1ee7 v\u00e0 \u1ee9ng d\u1ee5ng.<\/p>\n\n\n\n<p>Vi\u1ec7c gi\u1ea3i th\u00edch ch\u00ednh x\u00e1c s\u1ebd ng\u0103n ch\u1eb7n vi\u1ec7c thay th\u1ebf sai, c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c v\u00e0 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u0111\u00e1ng tin c\u1eady trong \u0111i\u1ec1u ki\u1ec7n k\u1ef9 thu\u1eadt th\u1ef1c t\u1ebf. \u0110\u1ed1i v\u1edbi c\u00e1c nh\u00f3m mua s\u1eafm, vi\u1ec7c hi\u1ec3u r\u00f5 nh\u1eefng d\u1ea5u hi\u1ec7u n\u00e0y kh\u00f4ng ph\u1ea3i l\u00e0 \u0111i\u1ec1u b\u1eaft bu\u1ed9c\u2014\u0111\u00f3 l\u00e0 k\u1ef9 n\u0103ng ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng c\u01a1 b\u1ea3n \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn s\u1ef1 an to\u00e0n v\u00e0 \u0111\u1ed9 tin c\u1eady.<\/p>","protected":false},"excerpt":{"rendered":"<p>Bolt head markings and strength grade codes are often overlooked during procurement, yet they are one of the most important identifiers for fastener quality and performance. In real industrial practice, these markings tell you more than a datasheet\u2014 they reveal the manufacturer\u2019s standard, material grade, and mechanical strength capability. A correct understanding helps prevent wrong [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[479],"tags":[504],"class_list":["post-7404","post","type-post","status-publish","format-standard","hentry","category-fastener-knowledge-library","tag-strength-grades-mechanical-properties"],"acf":[],"_links":{"self":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/7404","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/comments?post=7404"}],"version-history":[{"count":1,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/7404\/revisions"}],"predecessor-version":[{"id":7405,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/7404\/revisions\/7405"}],"wp:attachment":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/media?parent=7404"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/categories?post=7404"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/tags?post=7404"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}