Mil-Spec, Standard, SAE, Beveled, Large Outside Diameter
PEEK, Nylon, Phenolic Resin, Brass, Alloy Steel
1 17/32", 20 mm, 2 3/16", 1 37/64", 15/16"
1.375", 1.156", 0.75", 0.875", 1.125"
0.6 mm, 0.3 → 0.25 mm, 1.65 - 1.90 mm, 1.5 mm, 1.08 mm
BS 3410, DIN 6797J, BS 4320:1968, BS 4463, DIN 6798J