Countersunk Threaded Insert

A countersunk threaded insert is a rivet nut with a flat head that sits flush with the surface. It provides a threaded fixing point in thin sheet without a raised profile.

A countersunk threaded insert sits flush with the surface of thin sheet, so the joint stays smooth. It takes a setting tool that pulls the insert and upsets the body. A closed end countersunk insert seals the hole against liquids and gases.

This kind of insert is often made from steel, stainless steel or aluminium. Steel gives high strength. Stainless steel resists corrosion.

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. On receipt, check the head sits flat and the thread is clean. Confirm the thread size and material match the order.