Mudguard, External Tooth, Full Washers, Flat Washers, Form A
Steel, Fibre, Ceramic, Stainless Steel, TPE
12 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
12.2 mm, 12.5 mm, 5.36 mm, 2.25 mm, 6.5 mm
3.5 mm, 1.5 mm, 0.5 mm, 0.3 mm, 0.28 mm
M20, M24, M2, M5 (Form A), M12
DIN 125A, DIN 7980, ASME B18.21.1, BS 4320G, BS 4320B