External Tooth, Cup, Lock Washer, Full Washers, Form A
301 Stainless Steel, Brass, TPE, Copper, Steel
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
4.36 mm, 4.85 mm, 2.25 mm, 17 mm, 6.5 mm
5.8 mm, 0.7 mm, 0.6 mm, 8.1 mm, 2.5 mm
M5 (Form A), M5, M2, M8, M3
BS 4320:1968, DIN 7980, DIN 125A, BS 4320G, BS 4320B