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WIS 4-52-03A Issue 1 Amendment to: Specification for Anti-corrosion Coatings on Threaded Fasteners

Editorial changes to correct issue date on 3 pages of WIS 4-52-03 and renumbering of clauses in Appendix C.

Clause amended to reference additional “Appendix D” on “Adhesion”.

Replace Clause 6.3.8 to address appearance of “Coated test pieces” when tested in accordance with Annex C.

Two additions to Appendix A to address coating thickness measurement (addition to clause A2 and new clause A5 “Reporting”).

Additional clause B.5 “Reporting” added to Appendix B.

Additional Appendix D “Adhesion” added.


To be read in conjunction with WIS 4-52-03 Issue 1 December 1994.

One or more ‘Common Editorial Caveats’ apply – see ‘WIS & IGN Library/Navigation & Caveats’ for details.

Based on the Standards Board’s enquiries of stakeholders (British Coatings Federation & BSI Committee PSE/10 – Autumn 2021) the consensus view is that the existing document would benefit from updating to reflect new classes of coatings and take out old ones no longer used.

PSE/10 members reported the WIS is used quite frequently. They felt there was unlikely to be an EN standard as these tend to focus on the core product rather than connection products but PSE/10 doesn’t contribute in this area. Two proprietary coating products are widely used.

The Board has therefore initiated a review of the WIS’s continuing relevance and currency. PSE/10 suggested the reviewer inspects the following ISO standards on bolts, washers & fasteners: ISO 4016; ISO 4034; ISO 7091; ISO 10683 for relevant content.

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