GB/T 5267.1-2023: Fasteners - Electroplate coating

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Scope

This document specifies requirements for steel fasteners with electroplated coatings and
coating systems. The requirements related to dimensional properties also apply to
fasteners made of copper or copper alloys.
It also specifies internal hydrogen embrittlement requirements (see 4.4) and provides
recommendations for reducing the risk of hydrogen embrittlement (see Annex B).
It mainly applies to fasteners with 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).
In this document, only the dimensional requirements for standard threaded fasteners
apply to other coating and coating systems (tin, tin-zinc, copper-tin, copper-silver,
copper, silver, copper-zinc, nickel, nickel-chromium, copper-nickel, copper-nickel-
chromium).
This document's requirements for electroplated fasteners take precedence over other
documents concerning electroplating.
This document applies to standard threaded bolts, screws, studs, and nuts, as well as
non-standard threaded fasteners and non-threaded fasteners such as washers, pins,
clamps, and rivets.
NOTE. Electroplating is also applied to stainless steel fasteners, e.g. for the purpose of lubrication
in order to avoid galling.
Design and assembly information for coated fasteners can be found in Annex A.
This document does not specify the weldability or coating properties of the fasteners.

Basic Data

Standard ID	GB/T 5267.1-2023 (GB/T5267.1-2023)
Description (Translated English)	Fasteners - Electroplate coating
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J13
Classification of International Standard	21.060.01
Word Count Estimation	54,510
Date of Issue	2023-05-23
Date of Implementation	2023-12-01
Older Standard (superseded by this standard)	GB/T 5267.1-2002
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration