Standard, Mil-Spec, Oversized, SAE, Large Outside Diameter
Nylon, Phenolic Resin, Brass, Alloy Steel, Steel
20 mm, 1 3/4", 2 3/16", 1 37/64", 15/16"
0.813", 0.75", 0.375", 0.875", 1.125"
Chrome-Plated, NL-19, Zinc Plated, Armor Coat, Black Oxide
2.7 mm, 13/64", 4.6 mm, 0.55 mm, 1.6 mm