{"id":8714,"date":"2020-12-10T19:06:56","date_gmt":"2020-12-10T11:06:56","guid":{"rendered":"https:\/\/xzfastener.com\/?p=8714"},"modified":"2026-06-29T19:08:57","modified_gmt":"2026-06-29T11:08:57","slug":"fastener-dimensions-guide-for-bolts-nuts-washers-and-screws","status":"publish","type":"post","link":"https:\/\/xzfastener.com\/vi\/fastener-dimensions-guide-for-bolts-nuts-washers-and-screws\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn k\u00edch th\u01b0\u1edbc chi ti\u1ebft si\u1ebft ch\u1eb7t cho bu l\u00f4ng, \u0111ai \u1ed1c, v\u00f2ng \u0111\u1ec7m v\u00e0 \u1ed1c v\u00edt"},"content":{"rendered":"

Fastener dimensions are easy to underestimate. A buyer may confirm the diameter and length, then miss the thread pitch, head height, washer OD, or nut thickness. The part may look correct in a photo but fail during assembly.<\/p>\n\n\n\n

For RFQs, dimensions should be treated as technical data, not as a rough description. This is especially true when sourcing mixed s\u1ea3n ph\u1ea9m chi ti\u1ebft si\u1ebft ch\u1eb7t<\/a> for machinery, construction, maintenance, or distribution.<\/p>\n\n\n\n

Core Dimensions Buyers Should Confirm<\/h2>\n\n\n\n

Basic Measurement Points<\/h3>\n\n\n\n
s\u1ea3n ph\u1ea9m<\/th>K\u00edch th\u01b0\u1edbc ch\u00ednh<\/th>Common RFQ Mistake<\/th><\/tr><\/thead>
Bu l\u00f4ng<\/td>Diameter, pitch, length, thread length, head size<\/td>Confusing full thread and partial thread<\/td><\/tr>
\u0111ai \u1ed1c<\/td>Thread size, pitch, width across flats, height<\/td>Matching thread but wrong nut height<\/td><\/tr>
v\u00f2ng \u0111\u1ec7m<\/td>ID, OD, thickness, hardness<\/td>Choosing by bolt size only<\/td><\/tr>
V\u00edt<\/td>Diameter, length, head type, drive size, thread form<\/td>Measuring from the wrong point<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Bolt length is usually measured from under the head, except countersunk screws, which are measured overall. This small detail causes many receiving disputes.<\/p>\n\n\n\n

Bolt and Screw Standards<\/h2>\n\n\n\n

DIN, ISO, ASTM and Inch Series<\/h3>\n\n\n\n

Metric fasteners often reference DIN and ISO standards. Inch fasteners may follow ASTM, ASME, or SAE practices. Cross reference tables help, but they do not replace dimensional review.<\/p>\n\n\n\n

For example, DIN 933 and ISO 4017 both describe full thread hex bolts, but buyers should still confirm head dimensions, thread length rules, and tolerance expectations. The H\u01b0\u1edbng d\u1eabn ti\u00eau chu\u1ea9n chi ti\u1ebft si\u1ebft ch\u1eb7t DIN v\u00e0 ISO<\/a> is useful when drawings mix older and newer references.<\/p>\n\n\n\n

Nut and Washer Fit<\/h2>\n\n\n\n

The Assembly Must Match<\/h3>\n\n\n\n

A bolt is only one part of the joint. The nut and washer must fit the same standard logic.<\/p>\n\n\n\n

Assembly Item<\/th>Nh\u1eefng g\u00ec c\u1ea7n ki\u1ec3m tra<\/th><\/tr><\/thead>
h\u1ea1t<\/td>Grade, height, thread pitch, finish<\/td><\/tr>
V\u00f2ng \u0111\u1ec7m<\/td>Inner diameter, outer diameter, thickness, hardness<\/td><\/tr>
bu l\u00f4ng<\/td>Grade, length, thread engagement, coating<\/td><\/tr>
b\u1ec1 m\u1eb7t<\/td>Hole size, slot width, bearing area<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

For washers, OD matters. A larger OD spreads load over a wider bearing surface. A smaller OD may fit tight spaces but can increase surface pressure. Buyers can review v\u00f2ng \u0111\u1ec7m ph\u1eb3ng<\/a> when matching washer dimensions to bolts and nuts.<\/p>\n\n\n\n

Finish and Dimensional Fit<\/h2>\n\n\n\n

Coating affects dimensions. Hot dip galvanizing adds thickness and may require compatible nuts. Zinc plating, black oxide, zinc flake, and passivation each have different effects on appearance, corrosion resistance, and thread behavior.<\/p>\n\n\n\n

For coating-sensitive orders, review \u1ed1c v\u00edt tr\u00e1ng<\/a> before approving substitutions.<\/p>\n\n\n\n

RFQ Danh s\u00e1ch ki\u1ec3m tra<\/h2>\n\n\n\n

Send These Details First<\/h3>\n\n\n\n
    \n
  1. Standard or drawing.<\/li>\n\n\n\n
  2. Diameter and thread pitch.<\/li>\n\n\n\n
  3. Length and thread length.<\/li>\n\n\n\n
  4. Head or drive type.<\/li>\n\n\n\n
  5. Y\u00eau c\u1ea7u v\u1ec1 \u0111ai \u1ed1c v\u00e0 v\u00f2ng \u0111\u1ec7m.<\/li>\n\n\n\n
  6. Ch\u1ea5t li\u1ec7u v\u00e0 \u0111\u1eb3ng c\u1ea5p.<\/li>\n\n\n\n
  7. Finish.<\/li>\n\n\n\n
  8. Quantity by size.<\/li>\n\n\n\n
  9. Packing and label needs.<\/li>\n\n\n\n
  10. Inspection requirements.<\/li>\n<\/ol>\n\n\n\n

    If dimensions do not match catalog standards, review \u1ed1c v\u00edt t\u00f9y ch\u1ec9nh<\/a> tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n

    L\u1eddi khuy\u00ean cu\u1ed1i c\u00f9ng<\/h2>\n\n\n\n

    Good dimension control prevents wrong shipments, assembly delays, and claims. When details are unclear, send drawings, samples, or photos when you li\u00ean h\u1ec7 XZ Fastener<\/a>. A clear RFQ saves more time than a fast guess.<\/p>","protected":false},"excerpt":{"rendered":"

    Fastener dimensions are easy to underestimate. A buyer may confirm the diameter and length, then miss the thread pitch, head height, washer OD, or nut thickness. The part may look correct in a photo but fail during assembly. For RFQs, dimensions should be treated as technical data, not as a rough description. This is especially […]<\/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":[482],"class_list":["post-8714","post","type-post","status-publish","format-standard","hentry","category-fastener-knowledge-library","tag-fastener-sizes-specifications"],"acf":[],"_links":{"self":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/8714","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=8714"}],"version-history":[{"count":1,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/8714\/revisions"}],"predecessor-version":[{"id":8715,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/8714\/revisions\/8715"}],"wp:attachment":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/media?parent=8714"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/categories?post=8714"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/tags?post=8714"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}