ASME ANSI B18.22.1 Plain Washers

The common used inch series flat washers are covered under the ASTM F844, these regular flat washers are designed with a bearing surface, uses under the head of a bolt or bolt-like external threaded fasteners. Its usually made of low carbon steel unhardend, with various surface treatment options, black oxide, black zinc, white, yellow galvanizing, dacromet, hot dipper galvanizing, etc. While aluminium alloy or stainless steels, SUS304, 18-8, SUS316, brass, copper and bronze are also available.