Mudguard, Spring, Plain Washer, Full Washers, Form A
Fibre, Steel, TPE, Stainless Steel, Brass
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
21 mm, 5.36 mm, 2.25 mm, 13 mm, 6.5 mm
3.5 mm, 1.2 mm, 1.6 mm, 1.1 mm, 0.5 mm
M2.5, M3 (Form A), M3, M5 (Form A), M2
DIN 6797A, BS 4320B, BS 4320, DIN 7603A, ASME B18.21.1