Crinkle, Cup, Mudguard, Full Washers, Form A
Brass, Fibre, Ceramic, TPE, Stainless Steel
28 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
5.3 mm, 4.85 mm, 2.25 mm, 13 mm, 6.5 mm
3.5 mm, 0.7 mm, 0.6 mm, 0.4 mm, 1.1 mm
M6, M24, M12, M5 (Form A), M3
BS 4320:1968, ASME B18.8.1, ASME B18.21.1, BS 4320, BS 4320G