External Tooth, Nylon Washers, Cup, Full Washers, Form A
Brass, Fibre, Stainless Steel, Ceramic, TPE
12.5 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
3.2 mm, 5.36 mm, 2.25 mm, 8 mm, 6.5 mm
0.6 mm, 1.8 mm, 0.28 mm, 8.1 mm, 0.4 mm
M16, M5 (Form A), M3, M10, M2.5
BS 4320:1968, ASME B18.22.1 ASTM
F844, ASME B18.21.1, BS 4320B, DIN 7603A