Spring, Crinkle, Mudguard, Full Washers, Form A
Vulcanised Fibre, TPE, Copper, Steel, Brass
9.09 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
11 mm, 12.2 mm, 2.25 mm, 6 mm, 6.5 mm
0.4 mm, 0.28 mm, 8.1 mm, 0.5 mm, 0.3 mm
M3, M3 (Form A), M6, M24, M5 (Form A)
BS 4320:1968, BS 4463, ASME B18.8.1, ASME B18.21.1, BS 4320B