Description

Self-Drilling vs Self-Tapping Screws: What's the Best ...A self-drilling screw is a screw that can drill its own hole and cut its own threads. They are also known as Tek screws. How they work Self-drilling screws have a sharp point that acts as a drill bit. They can drill into wood and metal without a pilot hole. As the screw is driven in, the sharp threads cut into the material to create a fastening. Uses Self-drilling screws are used in construction and manufacturing. They are also used by homeowners and DIYers to fasten things around the house. They are especially useful for attaching metal shed roofing and making stamped metal parts. Types Self-drilling screws come in different head types, including hex, pan, flat, truss, wafer, oval, pancake, and round. They can be identified by their notch-like tip. Comparison to self-tapping screws Self-drilling screws can drill their own pilot hole, while self-tapping screws can only cut their own threads.