Table of Contents

Abstract

Specifies the requirements for electroplated coatings of zinc, applied either by barrel plating or other techniques, on fasteners with imperial threads (the UNC, UNF, BSW and BSF).
RECONFIRMATION NOTICE
Technical Committee MT-009 has reviewed the content of this publication and in accordance with Standards Australia procedures for reconfirmation, it has been determined that the publication is still valid and does not require change.
Certain documents referenced in the publication may have been amended since the original date of publication. Users are advised to ensure that they are using the latest versions of such documents as appropriate, unless advised otherwise in this Reconfirmation Notice.
Approved for reconfirmation in accordance with Standards Australia procedures for reconfirmation on 20 March 2017.
The following are represented on Technical Committee MT-009:
Australasian Institute of Surface Finishing
Australian Chamber of Commerce and Industry
Australian Industry Group
Australian Steel Institute
Bureau of Steel Manufacturers of Australia
Galvanizers Association of Australia
Galvanizing Association of New Zealand
New Zealand Metal Roofing Manufacturers

Scope

This Standard specifies the requirements for electroplated coatings of zinc, applied either by barrel plating or other techniques, on fasteners with imperial threads (UNC, UNF, BSW and BSF).
The Standard requires that coated threads be subject to ‘GO’ gauge acceptance criteria. It includes a method for the calculation of the degree of thread modification to accommodate thicker coatings.
NOTES:
1 Advice and recommendations on information to be supplied by the purchaser at the time of inquiry and order are contained in the purchasing guidelines set out in Appendix A.
2 This Standard may apply to threaded components other than fasteners, whether barrel or individually processed, subject to agreement between purchaser and supplier.
3 For a guide to complying to the Standard, refer to Appendix B.
4 A recommended sampling plan for electroplated zinc fasteners is contained in Appendix C.
5 For guidance on determining the surface area for imperial screws, bolts and nuts, refer to Appendix F.
6 For guidance on determining electroplating thickness for barrel plating refer to Appendix G.
7 For guidance on how to calculate plating thickness, refer to Appendix H.
8 For guidance on plating tolerances, refer to Appendix I.
9 For examples for calculating group average thickness variation, refer to Appendix J.
10 For examples for calculating external thread dimension to accommodate thicker coatings, refer to Appendix K.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	Reconfirmed 07/04/2017. This standard has been reconfirmed in Australia in 2017 and remains current in New Zealand. Reconfirmation Notice 07/04/2017
Pages
ISBN
Committee	MT-009
Supersedes	DR 06594 AS 4397-1996