本文件规定了钢紧固件电镀涂层和涂层系统的要求。与尺寸特性相关的要求也适用于铜或铜合金制成的紧固件。 它还规定了要求，并给出了将氢脆风险降至最低的建议；见4.4和附录B。 主要适用于锌和锌合金涂层系统（锌、锌镍、锌铁）和镉，主要用于防腐和其他功能特性: -有无转化膜； -有或没有密封剂； -有无面漆； -有或没有润滑剂（整体润滑剂和/或随后添加的润滑剂）。 其他电镀涂层和涂层系统（锡、锡锌、铜锡、铜银、铜、银、铜锌、镍、镍铬、铜镍、铜镍铬）的规范仅包含在本文件中，用于与ISO公制螺纹紧固件相关的尺寸要求。 本文件适用于ISO公制螺纹的螺栓、螺钉、螺柱和螺母、非ISO公制螺纹的紧固件，以及垫圈、销、夹子和铆钉等非螺纹紧固件。 附件A中给出了涂层紧固件的设计和组装信息。 本文件未规定焊接性或可涂漆性等性能要求。 注:其他国际标准规定了不同的电镀工艺。除非另有约定，否则本文件的要求适用于紧固件电镀。

This document specifies requirements for electroplated coatings and coating systems on steel fasteners. The requirements related to dimensional properties also apply to fasteners made of copper or copper alloys. It also specifies requirements and gives recommendations to minimize the risk of hydrogen embrittlement; see 4.4 and Annex B. It mainly applies to zinc and zinc alloy coating systems (zinc, zinc-nickel, zinc-iron) and cadmium, primarily intended for corrosion protection and other functional properties: — with or without conversion coating; — with or without sealant; — with or without top coat; — with or without lubricant (integral lubricant and/or subsequently added lubricant). Specifications for other electroplated coatings and coating systems (tin, tin-zinc, copper-tin, copper-silver, copper, silver, copper-zinc, nickel, nickel-chromium, copper-nickel, copper-nickel-chromium) are included in this document only for dimensional requirements related to fasteners with ISO metric threads. This document applies to bolts, screws, studs and nuts with ISO metric thread, to fasteners with non-ISO metric thread, and to non-threaded fasteners such as washers, pins, clips and rivets. Information for design and assembly of coated fasteners is given in Annex A. This document does not specify requirements for properties such as weldability or paintability. NOTE Other International Standards specify differing electroplating processes. For electroplating of fasteners, the requirements of this document apply, unless otherwise agreed.