Mil-Spec, Standard, Large Outside Diameter, SAE, Beveled
Stainless Steel, Steel, Phenolic Resin, Titanium, PEEK
20 mm, 2 3/4", 5 1/2", 28 mm, 1 3/16"
20.2 mm, 1.875", 1.172", 0.25", 1.109"
0.5 mm, 0.4 mm, 0.28 mm, 8.1 mm, 0.3 mm
BS 4320:1968, BS 4320, ASME B18.22.1
ASTM F844, DIN 125A, DIN 7603A