These 5/32 inch rivet washers are designed to be used as backup washers with pop and blind rivets, helping support thin or soft materials during riveting. By spreading the load over a wider area on the backside, they help reduce rivet pull-through and improve the overall stability of riveted joints, especially on thin sheet metal, plastic, and fiberglass. Keeping extra backup washers on hand helps avoid project delays caused by rivet pull-through or installation errors. The 100 pack size is well suited for repairs, multiple fastening points, and repeated riveting tasks. Made from 304 stainless steel, these washers offer corrosion resistance for indoor, outdoor, and damp environments.