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..Ideal for any project involving light gauge sheet metal, awnings, door and window frames, gutters, sheds.
Commonly used with flat or lockwashers.Machine screws are used in fastening nearly all types of hard materials. 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. 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.