{"id":66978,"date":"2026-04-20T13:34:08","date_gmt":"2026-04-20T13:34:08","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/din-609\/"},"modified":"2026-04-20T13:42:19","modified_gmt":"2026-04-20T13:42:19","slug":"din-609","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/din-609\/","title":{"rendered":"DIN 609"},"content":{"rendered":"<h2>Technical description and scope of the DIN 609 standard<\/h2>\n<p>The DIN 609 standard regulates the geometric parameters and technical requirements for high-strength hexagon head bolts equipped with a long threaded shank (fit bolt). These products are designed to ensure precision connections in mechanical engineering assemblies. The range of nominal metric thread diameters is from 8 mm to 52 mm.<\/p>\n<p>Product accuracy classification according to the standard:<\/p>\n<ul>\n<li>Accuracy class A: applies to bolts with a thread diameter d \u2264 10 mm.<\/li>\n<li>Accuracy class B: applies to products with a thread diameter d \u2265 12 mm.<\/li>\n<\/ul>\n<p>For fasteners with a nominal thread diameter exceeding 39 mm, the provisions of DIN 609 are mandatory regarding compliance with dimensional tolerances. Additional physical and mechanical characteristics not covered by this standard must be agreed upon between the customer and the supplier EV Group China at the stage of concluding the supply contract.<\/p>\n<p><strong>Important note:<\/strong> In the current revision of the standard, updated wrench sizes (16, 18, 21, and 34 mm respectively) are provided for nominal thread diameters of 10, 12, 14, and 22 mm, which complies with the requirements of DIN ISO 272. The wrench parameters of the previous standard (17, 19, 22, and 32 mm) have been moved to the informative Annex A and can be used for the repair or maintenance of legacy equipment.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[116,122],"class_list":["post-66978","wiki","type-wiki","status-publish","hentry","wiki_category-din","wiki_category-standarty"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/66978","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/66978\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=66978"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=66978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}