Internal Tooth, Cup, Full Washers, Flat Washers, Form A
Steel, Fibre, TPE, Stainless Steel, Brass
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
11 mm, 10.5 mm, 2.25 mm, 4.36 mm, 6.5 mm
0.9 mm, 1.5 mm, 0.28 mm, 0.6 mm, 2.2 mm
M12, M5, M24, M5 (Form A), M6
ASME B18.21.1, BS 4463, BS 4320G, ASTM F436, BS 4320B