Cup, Mudguard, Plain Washer, Full Washers, Form A
Fibre, Steel, TPE, Nylon, Stainless Steel
28 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
3.2 mm, 12.2 mm, 13 mm, 4.36 mm, 6.5 mm
8.1 mm, 0.8 mm, 1.1 mm, 1 mm, 0.28 mm
M6 (Form A), M8, M3 (Form A), M6, M5 (Form A)
BS 4463, DIN 7980, DIN 125A, ASME B18.21.1, BS 4320B