Internal Tooth, Mudguard, Crinkle, Full Washers, Form A
Fibre, Steel, Stainless Steel, TPE, Brass
8.8 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
14 mm, 5.36 mm, 2.25 mm, 4.36 mm, 6.5 mm
3.5 mm, 0.7 mm, 2 mm, 0.3 mm, 0.28 mm
M12, M5 (Form A), M10, M2.5, M3
DIN 7980, BS 4320G, DIN 7603A, ASME B18.22.1
ASTM F844, BS 4320B