Cup washer

A cup washer is a fastener accessory often paired with bolts, screws, or rivets to boost support and stability. This product's role is to spread the load uniformly across a wider area, shielding the material's surface from the fastener. They're typically made from high-quality materials such as steel or brass. Their distinct cup shape allows them to snugly encase the fastener head, ensuring a secure grip.

The steel cup washer is formed by stamping it from a steel sheet, resulting in a smooth contact surface.