{"id":69772,"date":"2026-05-17T17:28:05","date_gmt":"2026-05-17T17:28:05","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/en-iso-8674\/"},"modified":"2026-05-19T15:31:06","modified_gmt":"2026-05-19T15:31:06","slug":"en-iso-8674","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/en-iso-8674\/","title":{"rendered":"EN ISO 8674"},"content":{"rendered":"<h2>Technical specifications and application of EN ISO 8674 high nuts<\/h2>\n<p>The international standard EN ISO 8674 regulates the geometric and operational parameters of high hexagon nuts (style 2) equipped with a metric fine thread. The products are intended for critical assemblies with a nominal thread diameter from 8 mm to 36 mm. According to the classification, products with a nominal thread diameter up to and including 16 mm belong to accuracy class A, while nuts with a diameter over 16 mm belong to class B.<\/p>\n<p>The engineering department of EV Group China recommends taking into account the requirements of ISO 724, ISO 898-2, ISO 965-1, and ISO 4759-1 standards when designing high-load connections to ensure full compatibility of the fasteners.<\/p>\n<h3>Technical delivery conditions and quality standards<\/h3>\n<table class=\"table table-bordered table-hover\">\n<tbody>\n<tr>\n<td>Manufacturing material<\/td>\n<td>Steel<\/td>\n<\/tr>\n<tr>\n<td>General requirements<\/td>\n<td>ISO 8992<\/td>\n<\/tr>\n<tr>\n<td>Thread tolerance class<\/td>\n<td>6H (ISO 724, 965-1)<\/td>\n<\/tr>\n<tr>\n<td>Property class<\/td>\n<td>D\u226416 mm: 8, 12; D\u226439 mm: 10 (according to ISO 898-2)<\/td>\n<\/tr>\n<tr>\n<td>Product grades<\/td>\n<td>D\u226416 mm: grade A; D&gt;16 mm: grade B (according to ISO 4759-1)<\/td>\n<\/tr>\n<tr>\n<td>Surface quality<\/td>\n<td>Electroplating \u2014 ISO 4042; Zinc flake coatings \u2014 ISO 10683. Specific requirements for finish are agreed upon with EV Group China when placing an order.<\/td>\n<\/tr>\n<tr>\n<td>Surface condition<\/td>\n<td>Defect control according to ISO 6157-2<\/td>\n<\/tr>\n<tr>\n<td>Testing methods<\/td>\n<td>In accordance with ISO 3269 protocols<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[120],"class_list":["post-69772","wiki","type-wiki","status-publish","hentry","wiki_category-iso"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69772","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\/69772\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69772"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69772"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}