External Tooth, Lock Washer, Cup, Full Washers, Form A
Brass, Fibre, Steel, TPE, Copper
37 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
2.1 mm, 2.25 mm, 21 mm, 4.36 mm, 6.5 mm
8.1 mm, 2.5 mm, 3.5 mm, 2.2 mm, 0.28 mm
M2, M24, M12, M5 (Form A), M2.5
DIN 6797A, ASME B18.22.1 ASTM
F844, BS 4320B, BS 4463, DIN 7603A