External Tooth, Mudguard, Cup, Full Washers, Form A
Brass, Fibre, Nylon, Steel, TPE
12 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
2.1 mm, 12.2 mm, 10.5 mm, 17 mm, 6.5 mm
0.6 mm, 8.1 mm, 1.1 mm, 2.5 mm, 0.3 mm
M3 (Form A), M6, M24, M5 (Form A), M12
DIN 6797J, BS 4320B, DIN 127B, BS 4320, DIN 7603A