Fender Washers are used under the head a a nut or bolt to distribute the forces applied when tightening. Fender washers have a large outside diameter. They are the ideal solution for covering oversized or odd-shaped holes to prevent pull-through and are ideal to use with thin sheet metal. Fender washers can also protect the surrounding surface area. Designed for interior and exterior projects, sheet metal work, plumbing, electrical applications and auto body repair. The larger surface area offers a thinner body for strong, durable performance for all projects.