Galvanized steel is coated with zinc as a means of protection against corrosion. Hardened steel made by stamping is used to produce the initial washer shape before being coated with zinc. They are galvanized for increased resistance to corrosion, and conform to DIN125 standards. Washers provide a smooth surface for the nut or bolt to bear on, making it less likely to loosen as a result of an uneven fastening surface. A washer is a thin plate (typically disk-shaped, but sometimes square) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a bolt or nut. SIZES
All Size GaIvd Flat washer (per kg)

H.D.G Flat washer M10 & 3/8″

H.D.G Flat washer M12 & 1/2″

H.D.G Flat washer M16

H.D.G Flat washer 5/8″