External Tooth, Nylon Washers, Mudguard, Full Washers, Form A
Ceramic, Copper, TPE, Steel, Brass
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
3.2 mm, 13 mm, 5.3 mm, 4.36 mm, 6.5 mm
0.6 mm, 0.5 mm, 8.1 mm, 2.5 mm, 0.3 mm
M20, M6, M5 (Form A), M2, M3
ASME B18.22.1 ASTM
F844, DIN 7980, BS 4320, ASME B18.21.1, ASME B18.8.1