External Tooth, Cup, Plain Washer, Full Washers, Form A
Brass, Fibre, TPE, Steel, Stainless Steel
28 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
2.1 mm, 10.5 mm, 2.25 mm, 5 mm, 6.5 mm
0.6 mm, 0.5 mm, 1.6 mm, 0.8 mm, 1.1 mm
M5, M3 (Form A), M2, M5 (Form A), M6
DIN 7980, BS 4320:1968, ASME B18.21.1, BS 4320G, BS 4320B