6 x 1/2 Slotted Hex Washer Head Sheet Metal Screw Zinc Plated

6 x 1/2 Slotted Hex Washer Head Sheet Metal Screw Zinc Plated . 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.