Especially useful in metal-to-metal or where heavy duty fastening is required. Commonly used with flat or lockwashers. A machine screw, also called a stove bolt, is generally a smaller fastener threaded the entire length of its shank..
. A machine screw, also called a stove bolt, is generally a smaller fastener threaded the entire length of its shank.Machine screws are used in fastening nearly all types of hard materials.
Sheet metal screws make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood. 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.