Mudguard, Spring, Cup, Full Washers, Form A
TPE, Steel, Copper, Brass, Stainless Steel
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
2.1 mm, 12.2 mm, 5.36 mm, 4.36 mm, 6.5 mm
1.8 mm, 0.4 mm, 3.5 mm, 0.7 mm, 1.6 mm
M3 (Form A), M12, M8, M10, M5 (Form A)
BS 4320:1968, BS 4463, ASME B18.22.1
ASTM F844, BS 4320B, ASME B18.21.1