Machine, Self Drilling Screws, Grub Screw, Socket Screw, Flat Head Screw
Imperial, Metric, Fine, Metric, Coarse, Inch, Metric
1/4"-20, #4-40, #4-48, M10 x 1.50, M1.6x0.35
5 1/4", 3 3/4", 3/8", 7 1/2", 18 mm
Steel, Alloy Steel, Steel, Brass, Titanium, Nylon, Plastic
Low-Profile Standard, Flanged Standard, Ultra-Low-Profile Standard, Flat, Standard
Hex, Slot, External Square, Socket, Slotted