Square drive flat head

Sheet metal screws, Self tapping, Square drive flat head, 1-1/4"

Screws with coarse threads and a pointed end for use in sheet metal sometimes also used in plastic, fiberglass, or wood.

Sheet metal screws, Self tapping, Square drive flat head, 1-1/4"

Square drive flat head

Square drive flat head

Flat heads are countersunk (cone shaped under the head) with a flat top. Square drive is designed to reduce the risk of cam-out (stripping) and allow single-handed installation.

See also

Modified truss head self drilling drywall screw

Drywall screws, Phillips modified truss head, Self drilling

Modified truss heads have a low profile rounded top with a large bearing surface. Phillips drive is x-shaped for installation with a phillips screw driver.

Modified truss head drywall screw

Drywall screws, Phillips modified truss head, Piercing point

Modified truss heads have a low profile rounded top with a large bearing surface. Phillips drive is x-shaped for installation with a phillips screw driver.

Wood screw

Wood screws

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