Thread cutting screws cut their own mating threads into metal, plastic, or other material as they're driven in.

Diameter: 1/4"
Length: 1"
Material: Steel
Head Style: Oval (Phillips)
Point Type: Type F
Thread Size: 20 (Coarse)
Type: Thread Cutting Screw
A thread cutting screw has sharp threads that cut into a material such as sheet metal, plastic or wood. The shank is usually threaded up to the head. Thread cutting screws make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood.