14 x 4 Phillips Flat Sheet Metal Screw 18-8 (A2) Stainless Steel

14 x 4 Phillips Flat Sheet Metal Screw 18-8 (A2) Stainless Steel. Sheet metal screws or tapping screws are designed to bind sheet metal to wood and sometimes fiberglass. Manufactured with a sharper, more pronounced thread that allows the screw to better tap or penetrate metal surfaces.