Mil-Spec, Beveled, Large Outside Diameter, Standard, SAE
Nylon, Brass, PEEK, Titanium, Phenolic Resin
5.5 mm, 21 mm, 20 mm, 9.5 mm, 11.1 mm
6.5 mm, 16.5 mm, 20.2 mm, 1.875", 1.172"
0.16 mm, 0.28 mm, 0.3 mm, 0.7 mm, 0.6 mm
M2.6, M20, M2.5, M58, 5/16"
BS 4320, DIN 7980, DIN 6797J, DIN 125A, ASME B18.21.1