Cup, Mudguard, Plain Washer, Full Washers, Form A
Fibre, Brass, TPE, Steel, Stainless Steel
37 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
3.2 mm, 2.2 mm, 16.2 mm, 4.36 mm, 6.5 mm
5.8 mm, 1.8 mm, 3.5 mm, 8.1 mm, 2.5 mm
M5, M3 (Form A), M16, M5 (Form A), M2
ASME B18.22.1
ASTM F844, BS 4320, ASME B18.21.1, BS 4320G, BS 4320B