Standard, Mil-Spec, Oversized, SAE, Large Outside Diameter
Phenolic Resin, Steel, Brass, Alloy Steel, Stainless Steel
20 mm, 2 3/16", 1 37/64", 15/16", 2 1/4"
0.438", 0.75", 0.875", 1.125", 1.5"
0.6 mm, 8.1 mm, 0.3 → 0.25 mm, 1.65 - 1.90 mm, 1.08 mm
BS 4320, DIN 127B, ASME B18.22.1
ASTM F844, BS 4320G, BS 3410