3/16-Inch Aluminum Backup Washers, 1/2-Inch Outside Diameter, 500-Pack

These 3/16-Inch Aluminum Backup Washers provide additional support and load distribution when installing blind rivets in sheet metal, aluminum panels, and other compatible materials. Featuring a 3/16-inch nominal hole size and 1/2-inch outside diameter, these lightweight aluminum washers help distribute fastening pressure across a wider surface area, reducing the risk of rivets pulling through thin or softer materials. Their corrosion-resistant aluminum construction makes them suitable for a variety of indoor and outdoor fastening applications. Ideal for construction, automotive repairs, metal fabrication, and general maintenance, these backup washers provide added reinforcement for riveted connections. Packaged in a convenient box of 500, they are a practical choice for contractors, metalworkers, and maintenance professionals.