Imperial, Metric, Fine, Metric, Coarse, Inch, Metric
#6-40, M8, M10 x 1.50, #6-32, #10-32
2 1/4", 7 1/2", 80 mm, 3 11/16", 85 mm
Aluminum, Brass, Steel, Titanium, Nylon, Plastic
Low-Profile Standard, Button, Flat, Ultra-Low-Profile Standard, Flanged Button
Hex, Torx, Socket, External Square, Slotted