Narrow, SAE, Large Outside Diameter, Standard, Oversized
Nylon, Alloy Steel, Steel, Titanium, Phenolic Resin
7/8", 66 mm, 1 5/16", 23 mm, 1 3/4"
8.4 mm, 16.5 mm, 20.2 mm, 1.875", 1.172"
2.5 mm, 1.5 mm, 0.8 mm, 0.3 mm, 0.28 mm
DIN 127B, DIN 6797J, BS 4320, BS 4320B, BS 4463