GB/T 5267.2-2021
Fasteners—Non-electrolytically applied zinc flake coatings (English Version)
- Standard No.
- GB/T 5267.2-2021
- Language
- Chinese, Available in English version
- Release Date
- 2021
- Published By
- 国家市场监督管理总局、中国国家标准化管理委员会
- Latest
- GB/T 5267.2-2021
- Replace
- GB/T 5267.2-2017
- Scope
- This document specifies the technical requirements for the electroless zinc flake coating of steel fasteners. This document applies to the following coatings: --- with or without hexavalent chromium; --- with or without surface coating; --- with or without lubrication (self-lubricating and/or additional lubrication). This document applies to bolts, screws, studs and nuts with ISO metric thread, fasteners with non-ISO metric thread, and fasteners without thread, such as washers, pins, clamps, etc. This document does not specify the weldability or coating performance of fasteners and is not applicable to mechanical galvanizing. NOTE: High-strength fasteners (tensile strength ≥ 1000 MPa) use coatings in accordance with this document to avoid the risk of internal hydrogen embrittlement (see 4.4). See Appendix A for coated fastener design and installation information.
GB/T 5267.2-2021 Referenced Document
- GB/T 1237 Designation system for fasteners
- GB/T 3099.3 Terminology of fasteners—Coatings
GB/T 5267.2-2021 history
- 2021 GB/T 5267.2-2021 Fasteners—Non-electrolytically applied zinc flake coatings
- 2017 GB/T 5267.2-2017 Fasteners.Non-electrolytically applied zinc flake coatings
- 2002 GB/T 5267.2-2002 Fasteners--Non-electrolytically applied zinc flake coatings
