4.2mm x 40mm Black Oxide Steel Star Drive Oval Head Sheet Metal Screws

Diameter: 4.2mm
Length: 40mm
Material: Steel
Finish: Black Oxide
Head Style: Oval (T-15 Star Bit)
Thread Length: Full
Type: Sheet Metal Screw

Box of 12.

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.