One reason is to create a smooth surface to protect mating materials within the application and spread clamp load.
Many washers have sealing features to prevent leakage. Others have features to prevent loosening - ie Shakeproof Washers.
Our Sales team would be pleased to offer a quotation on your requirements. Please telephone or fax on the numbers below or email us.
Garton International
Unit 2A
Swan Lane
Hindley Green
Wigan WN2 4HD
Tel : +44 (0) 1942 520270
Fax : +44 (0) 1942 520271