Introduction of self-tapping screws

Self-drilling screws connect components in just one working step: drill, form the thread and tighten. This reduces installation time and saves costs for tool changes and drill bits. Self-drilling screws are completed by an optional pre-assembled sealing washer.

Self-drilling screws are available in stainless steel (for areas exposed to the elements) and galvanized steel (for areas not exposed to the elements).

Working Principle
Cutting/Extrusion Forming:
Cutting type tapping screw: The tip is designed to be sharp or with a cutting groove (such as a triangular blade), which cuts into the material and removes debris by rotation to form a thread.
Extrusion type tapping screw: The material is plastically deformed through the tapered design of the thread (such as a large lead or tapered thread), and a matching internal thread is extruded without generating debris (suitable for plastics or soft metals).
Thread design: Usually a coarse thread (large pitch and shallow depth) to improve the bite force and resistance to vibration loosening.