Cup, Mudguard, Internal Tooth, Full Washers, Form A
301 Stainless Steel, TPE, Copper, Brass, Stainless Steel
8.8 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
2.6 mm, 4.85 mm, 21 mm, 2.25 mm, 6.5 mm
0.9 mm, 1.8 mm, 0.28 mm, 0.6 mm, 8.1 mm
M2.5, M3 (Form A), M16, M12, M5 (Form A)
DIN 127B, BS 4320:1968, BS 4463, ASME B18.21.1, BS 4320B