Imperial, Metric, Fine, Metric, Coarse, Inch, Metric
M4x0.7, M12x1.75, M20x2.5, 1/2"-13, M6
2 7/8", 200 mm, 20 mm, 8 mm, 18 mm
Steel, Alloy Steel, Brass, Steel, Nylon, Plastic, Titanium
Low-Profile Standard, Ultra-Low-Profile Standard, Standard, Flanged Standard, Flat
Cross, Hex, Socket, External Square, Slotted