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.
A self-drilling screw, or tek screw, is similar to a sheet metal screw, but it has a drill-shaped point to cut through the substrate to eliminate the need for drilling a pilot hole.
A self-drilling screw, or tek screw, is similar to a sheet metal screw, but it has a drill-shaped point to cut through the substrate to eliminate the need for drilling a pilot hole..