{"id":69789,"date":"2026-05-17T17:28:10","date_gmt":"2026-05-17T17:28:10","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/en-iso-7040\/"},"modified":"2026-05-19T15:31:13","modified_gmt":"2026-05-19T15:31:13","slug":"en-iso-7040","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/en-iso-7040\/","title":{"rendered":"EN ISO 7040"},"content":{"rendered":"<h2>Technical specifications and scope of EN ISO 7040<\/h2>\n<p>The EN ISO 7040 standard establishes strict requirements for prevailing torque type hexagon nuts with a non-metallic insert, designed to create reliable threaded connections resistant to vibration loads. These products, supplied by EV Group China, cover a metric thread range from M3 to M36.<\/p>\n<p>Design features:<\/p>\n<ul>\n<li>Product grade A: for fasteners with a nominal thread diameter up to and including M16.<\/li>\n<li>Product grade B: for products with a nominal thread diameter larger than M16.<\/li>\n<li>Property classes: 5, 8, and 10, which allows for selecting an optimal solution for specific operational loads.<\/li>\n<\/ul>\n<p>The geometric parameters of the products fully comply with the ISO 4032 standard, taking into account the specifics of integrating a polymer (non-metallic) locking insert that provides a prevailing torque effect. The quality of EV Group China products is confirmed by compliance with international standards, including ISO 261, ISO 724, ISO 898-2, ISO 965-2, ISO 2320, and ISO 4759-1, which guarantees the stability of characteristics in the most critical equipment assemblies.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[120],"class_list":["post-69789","wiki","type-wiki","status-publish","hentry","wiki_category-iso"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69789","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\/69789\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69789"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69789"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}