Internal Tooth, Cup, Plain Washer, Full Washers, Form A
Brass, Fibre, Stainless Steel, TPE, Steel
3/4" X 3" X 1/4", 15.5 mm, 12 mm, 6.9 mm, 11.88 mm
21 mm, 11 mm, 10.5 mm, 5 mm, 6.5 mm
8.1 mm, 0.8 mm, 1.1 mm, 1.6 mm, 0.3 mm
M5 (Form A), M12, M16, M5, M2
BS 4320, DIN 7603A, DIN 6797J, DIN 7980, BS 4320B