4.2mm x 20mm Black Oxide Indented Hex Washer Head Sheet Metal Screws (10 pcs.)Type: Sheet Metal Screws
Finish: Black Oxide
Head Style: Indented Hex Washer (Hex)
Thread Length: Full
Type: Sheet Metal Screw
Box of 10.
A sheet metal screw has sharp threads that cut into a material such as sheet metal, plastic, wood, hard rubber, aluminum, and other comparable compositions. Sheet metal screws make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood.