Imperial, Metric, Fine, Metric, Coarse, Metric, Inch
M8x1, M2x0.4, M10x1.25, M20x2.5, 1/4"-20
3 3/16", 2 1/8", 1 7/8", 50 mm, 30 mm
Brass, Steel, Steel, Alloy Steel, Nylon, Plastic, Titanium
Low-Profile Standard, Flanged Standard, Ultra-Low-Profile Standard, Flanged Button, Flat
Phillips, Hex Socket, Socket, External Square, Slotted