Cup, External Tooth, Plain Washer, 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
6 mm, 21 mm, 2.2 mm, 4.36 mm, 6.5 mm
1.8 mm, 1.2 mm, 2.5 mm, 1.1 mm, 0.16 mm
M20, M16, M5 (Form A), M2, M2.5
DIN 7980, ASME B18.22.1
ASTM F844, BS 4320B, DIN 7603A, BS 4463