Thread Cutting Screw

A thread cutting screw is a screw that cuts its own thread in a drilled hole. It has a cutting edge or slot at the point.

A thread cutting screw cuts a thread as it enters a drilled or pilot hole. It often suits sheet metal, plastic and softer materials. It is usually driven with a screwdriver or power tool bit that matches its head.

This kind of screw is often made in steel with a corrosion resistant finish. Some are made in stainless steel for outdoor or wet use. The material affects strength and corrosion resistance.

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 for material and dimensions. On receipt, check the cutting point and threads for damage. Check the drive recess for wear or defects.