External Tooth, Internal Tooth, Plain Washer, Full Washers, Form A
Steel, Ceramic, TPE, Copper, Brass
4.51 mm, 3/4" X 3" X 1/4", 15.5 mm, 6.9 mm, 11.88 mm
17 mm, 2.1 mm, 2.25 mm, 4.36 mm, 6.5 mm
3.5 mm, 0.28 mm, 1.6 mm, 1 mm, 2.5 mm
M3, M12, M3 (Form A), M16, M5 (Form A)
ASME B18.21.1, ASME B18.8.1, ASME B18.22.1
ASTM F844, BS 4320B, DIN 125A