Screws with large threads for use in sheet metal sometimes also used in plastic, fiberglass, or wood.

Sheet metal screws, Hex washer head, Dagger guard coated steel, 2"

Hex washer head self drilling sheet metal screw

Self drilling

Screws with coarse threads and a drill point end for use in thicker gauge steel.

See also

Wood screw

Wood screws

Screws with a smooth shank and tapered point for use in wood.