Cup, Plain Washer, Crinkle, Full Washers, Form A
Brass, Vulcanised Fibre, TPE, Stainless Steel, Steel
12 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
2.1 mm, 5.36 mm, 2.25 mm, 21 mm, 6.5 mm
1.2 mm, 0.4 mm, 1.5 mm, 1.1 mm, 0.28 mm
M16, M12, M24, M5 (Form A), M4
BS 4320:1968, BS 4320, ASME B18.22.1
ASTM F844, DIN 7603A, ASME B18.21.1