Standard, Narrow, Large Outside Diameter, Beveled, Mil-Spec
Nylon, Phenolic Resin, Brass, Steel, Titanium
50 mm, 66 mm, 40 mm, 23 mm, 1 3/4"
16.5 mm, 20.2 mm, 0.375", 0.172", 1.172"
8.1 mm, 0.4 mm, 2.5 mm, 0.3 mm, 1.6 mm
DIN 127B, DIN 6797J, BS 4320, BS 4320G, DIN 7603A