Internal Tooth, Nylon Washers, Plain Washer, Full Washers, Form A
301 Stainless Steel, Vulcanised Fibre, Nylon, Steel, Brass
3/4" X 3" X 1/4", 7.99 mm, 15.5 mm, 6.9 mm, 11.88 mm
13 mm, 6.4 mm, 2.25 mm, 4.36 mm, 6.5 mm
8.1 mm, 1.1 mm, 1.5 mm, 0.3 mm, 0.28 mm
M16, M24, M5 (Form A), M20, M2
BS 4320:1968, BS 4463, DIN 7980, ASME B18.8.1, BS 4320B