Standard, SAE, Mil-Spec, Oversized, USS
Stainless Steel, Phenolic Resin, Brass, Steel, Nylon
14 mm, 45 mm, 50 mm, 2 1/2", 23 mm
0.438", 0.391", 1.313", 1.563", 0.5"
2.5 mm, 5.8 mm, 0.28 mm, 0.7 mm, 3.5 mm
ASME B18.22.1
ASTM F844, DIN 6797J, ASME B18.21.1, BS 4320G, BS 4320B