External Tooth, Cup, Mudguard, Full Washers, Form A
Fibre, Brass, Steel, TPE, Nylon
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
4.85 mm, 21 mm, 17 mm, 16.2 mm, 6.5 mm
0.4 mm, 0.5 mm, 0.16 mm, 3 mm, 0.28 mm
M3.5, M16, M3 (Form A), M5 (Form A), M3
BS 4320B, BS 4320:1968, ASME B18.22.1
ASTM F844, ASME B18.21.1, BS 4463