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BS 7371-8:2011

BS 7371-8:2011

Current

Current

The latest, up-to-date edition.

Coatings on metal fasteners Specification for sherardized coatings

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

03-31-2011

Publisher

British Standards Institution

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Process
5 Classification
6 Properties
7 Thread clearance
8 Information to be documented and supplied to
  the coater
9 Identification
Annexes
Annex A (informative) - Selection of coating
Annex B (normative) - Measurement of coating
        thickness
Bibliography

Describes requirements for sherardized coatings on iron and steel fasteners and accessories applied by thermal diffusion of zinc powder onto a component's surface.

Committee
FME/9/-/1
DevelopmentNote
Supersedes BS 7371-8(1998) & 10/30228091 DC. (03/2011)
DocumentType
Standard
Pages
20
PublisherName
British Standards Institution
Status
Current
Supersedes

This part of BS7371 specifies requirements for sherardized coatings on iron and steel fasteners and accessories applied by thermal diffusion of zinc powder onto a component’s surface. NOTE Hydrogen embrittlement is not induced as a result of this coating process. The coating consists of zinc/iron alloys, which are subsequently treated using either a zinc phosphate treatment (see BS7371-9:1996, Type2) or a suitable substitute treatment similar to those used in electroplating zinc (see BS7371-3:2009) and mechanical plating (see BS7371-7:2010). This results in a dust free surface, which, when required, can be lubricated to give controlled torque/clamping force properties (see BS7371-2:1993). In addition to the requirements in this part of BS7371, the requirements in BS7371-1:2009 that are applicable to sherardized coatings apply. This part of BS7371 also specifies requirements for: the local coating thickness for six grades of coating; possible types of post treatment; the assessment of corrosion resistance of unused coated parts when subjected to neutral salt spray testing (see BSENISO9227:2006).

BS 7371-9:1996 Coatings on metal fasteners Specification for phosphate or phosphate and oil coatings
BS 1210:1963 Specification for wood screws
BS 7371-10:1994 Coatings on metal fasteners Specification for organic coatings
BS 7371-11:1993 Coatings on metal fasteners Specification for zinc flake non-electrolytically applied cured coatings
BS EN ISO 3497:2001 Metallic coatings. Measurement of coating thickness. X-ray spectrometric methods
BS 7371-6(1998) : 1998 COATINGS ON METAL FASTENERS - PART 6: SPECIFICATION FOR HOT DIPPED GALVANIZED COATINGS
BS EN 15048-2:2007 Non-preloaded structural bolting assemblies Suitability test
BS EN ISO 10683:2014 Fasteners. Non-electrolytically applied zinc flake coatings
BS 7371-2:1993 Coatings on metal fasteners Specification for torque/clamping force relationship
BS EN 15048-1:2007 Non-preloaded structural bolting assemblies General requirements
BS 7371-4:1994 Coatings on metal fasteners Specification for electroplated nickel, nickel/chromium and copper/nickel/chromium coatings
BS EN ISO 1463:2004 Metallic and oxide coatings. Measurement of coating thickness. Microscopical method
BS EN ISO 9227:2017 Corrosion tests in artificial atmospheres. Salt spray tests
BS 7371-12:2008 Coatings on metal fasteners Requirements for imperial fasteners
BS EN ISO 3882:2003 Metallic and other inorganic coatings. Review of methods of measurement of thickness

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Hardcopy - English
PDF - English
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