Self-Drilling Screw

A self-drilling screw is a screw with a drill point that can drill its own hole in thin metal or other materials. It is used to fasten materials without pre-drilling.

A self-drilling screw drills its own hole through thin metal and forms a thread as it is driven. It takes a driver bit or nut runner of the matching recess. The screw often joins metal sheets to purlins or frames.

Zinc plating is a coating that helps protect the screw from corrosion. It is often used for indoor or mildly corrosive environments.

This kind of screw is often made in stainless steel or steel. Stainless steel offers better corrosion resistance, while steel is stronger and often used with a coating.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a certificate of conformance to confirm the material and coating. On receipt, check the screw for sharp drill point and correct dimensions.