1.1 本规范涵盖了带统一英制和公制螺纹的螺纹紧固件上电沉积涂层的应用、性能和尺寸要求，但也可适用于其他螺纹零件和非螺纹零件，如垫圈和销。它规定了涂层厚度、补充六价铬酸盐或非六价转化涂层、耐腐蚀性、管理氢脆风险的预防措施以及高强度和表面硬化紧固件的氢脆消除。它还强调了滚镀和机架镀之间的差异，并就每种工艺的适用性提出了建议。 1.2 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.3 本规范中使用的术语在术语中定义 F1789 . 1.4 以下预防说明仅适用于试验方法部分，第 9 ，本规范: 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。

1.1 This specification covers application, performance and dimensional requirements for electrodeposited coatings on threaded fasteners with unified inch and metric screw threads, but it may also be applied to other threaded parts and non-threaded parts such as washers and pins. It specifies coating thickness, supplementary hexavalent chromate or non-hexavalent conversion coatings, corrosion resistance, precautions for managing the risk of hydrogen embrittlement and hydrogen embrittlement relief for high-strength and surface-hardened fasteners. It also highlights the differences between barrel and rack plating and makes recommendations as to the applicability of each process. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.3 Terms used in this specification are defined in Terminology F1789 . 1.4 The following precautionary statement pertains to the test method portion only, Section 9 , of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.