Sheet Metal Screws
Sharp Point and Self Drilling Screws with Cutting Threads for Metal, Plastic or Wood
Sheet metal screws have sharp cutting threads that cut into sheet metal, plastic or wood. Some sheet metal screws are classified as Type 17 Point, these screws are notched at the tip to aid in chip removal during thread cutting. Shet metal screws as also known as self tapping screws because they tap and cut into the metal as they are installed. Self driller cutting points, also known as TEK screws available in TEK 2, 3, 4 and 5, pierce through 20 to 14 gauge metals. The higher the TEK number the larger the drill point to pierce heavier gauge metals. The shank of a machine screw is threaded up to the head or to the undercut, also known as fully threaded or FT. Sheet metal screws make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides excellent retention in wood. As the name indicates, they are often used with sheet metal because of the sharp self tapping point.