Cup, Plain Washer, Mudguard, Full Washers, Form A
Brass, Steel, TPE, Copper, Stainless Steel
37 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
3.2 mm, 13 mm, 2.25 mm, 4.36 mm, 6.5 mm
8.1 mm, 1.2 mm, 2.5 mm, 1.5 mm, 1.6 mm
M20, M2, M5, M5 (Form A), M10
BS 4320B, DIN 6798J, ASME B18.21.1, DIN 7603A, BS 4320