Internal Tooth, Cup, Lock Washer, Full Washers, Form A
Steel, Vulcanised Fibre, TPE, Stainless Steel, Brass
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
4.85 mm, 13 mm, 5.36 mm, 2.25 mm, 6.5 mm
5 mm, 0.6 mm, 1.6 mm, 2.2 mm, 0.28 mm
M16, M5 (Form A), M4, M2, M3
DIN 7603A, BS 4320B, DIN 127B, DIN 6798J, ASME B18.8.1