External Tooth, Internal Tooth, Plain Washer, Full Washers, Form A
Stainless Steel, Vulcanised Fibre, TPE, Nylon, Brass
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
4.85 mm, 2.1 mm, 5.36 mm, 2.25 mm, 6.5 mm
0.28 mm, 1 mm, 8.1 mm, 0.3 mm, 2.2 mm
M12, M5 (Form A), M4, M6, M5
DIN 127B, BS 4320B, BS 4320:1968, DIN 7603A, BS 4320