Internal Tooth, Plain Washer, External Tooth, Full Washers, Form A
Steel, TPE, Ceramic, Stainless Steel, Brass
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
12.2 mm, 12.5 mm, 16.2 mm, 6 mm, 6.5 mm
5.8 mm, 0.6 mm, 1.8 mm, 3.5 mm, 0.28 mm
M8, M16, M5 (Form A), M2, M2.5
ASME B18.8.1, DIN 7980, DIN 7603A, BS 4320, BS 4320B