Truss Head

A truss head is a screw head style with an extra-wide, slightly rounded top and a low-profile height. Compared with a standard pan head, a truss head has a larger bearing surface (the underside of the head covers more area), which helps the fastener distribute load over a wider footprint. You will often see truss head screws in sheet metal, plastics, and assemblies where the head needs to cover an oversized hole or a thin, softer material.

Truss head screws are commonly chosen to reduce the chance of pull-through and to provide a neat, finished appearance without the head standing too tall above the surface. They are not intended to sit flush like a flat head/countersunk screw, and they are typically used where a broad clamping area is more important than a low outer diameter. Because the head is wide, it can also help prevent damage to the material surface, especially when fastening thin-gauge metal, plastic panels, or brackets.