Truss Head Screw

A truss head screw is a machine screw with a wide, low-profile rounded head. The head spreads load over a larger area than a standard pan head. It is often used where a neat, low-profile finish is wanted.

A truss head screw fastens sheet metal, panels and light assemblies where a low, wide head is wanted. It often takes a nut or a tapped hole of the same thread, and a washer can spread the load under the head. A cross recess driver holds the head during tightening.

This screw is often made in stainless steel 304. That grade resists rust in indoor and mild outdoor conditions. It is not the best choice for salt water or strong chemicals.

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 and a mill test certificate for the stainless steel. On receipt, check the head shape, the recess and the thread with a gauge. Confirm the material grade with a test certificate if the application is critical.