Internal Tooth, Cup, Lock Washer, Full Washers, Form A
Stainless Steel, Ceramic, Nylon, Brass, Steel
3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 20 mm, 11.88 mm
3.2 mm, 2.1 mm, 13 mm, 12.2 mm, 6.5 mm
0.28 mm, 0.6 mm, 0.4 mm, 2.5 mm, 2 mm
M3 (Form A), M8, M5 (Form A), M16, M3
BS 4320B, BS 4320:1968, ASME B18.22.1
ASTM F844, DIN 7980, BS 4320