A type of self-tapping screw, also known as “self-drilling” screw, the tail of the screw is like a drill bit. It is not necessary to tap the lock. You can use the drill tail screw to tap directly. Because there is a need for direct tapping, its material is carburized and heat-treated to increase hardness. The locks are often made of wood, iron plate or construction cement, etc., and are often used in the construction industry. According to the head shape, it can be divided into round head, large flat head, dish head, hexagonal washer head, etc.

Item number: BY