Countersunk Washer, Cup, Lock Washer, Full Washers, Form A
Ceramic, Steel, Copper, Brass, Stainless Steel
8.8 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
2.2 mm, 2.25 mm, 17 mm, 4.36 mm, 6.5 mm
1.4 mm, 5.8 mm, 1.2 mm, 3.5 mm, 1.6 mm
M2.5, M3 (Form A), M20, M2, M5 (Form A)
BS 4320G, ASME B18.22.1
ASTM F844, DIN 7980, ASME B18.21.1, BS 4320B