External Tooth, Crinkle, Cup, Full Washers, Form A
301 Stainless Steel, Brass, TPE, Vulcanised Fibre, Steel
8.8 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
13 mm, 12.2 mm, 6.4 mm, 4.36 mm, 6.5 mm
2.2 mm, 1.8 mm, 8.1 mm, 1.1 mm, 0.8 mm
M2, M10, M6, M5 (Form A), M3
BS 4320B, BS 4320:1968, DIN 7603, DIN 7980, BS 4463