The washer creates a large holding surface on the back of the material. Also known as belt rivets, use for fastening conveyor belts or leather. Install in a countersunk hole and the angled head sits flush with the material's surface. These rivets are made of copper, which is electrically conductive, nonmagnetic, and has good corrosion resistance.

Installation requires access to both sides of the material as well as a tool and a hammer.