Back Home / Fasteners / Rivets / RIVET BACKUP WASHER ALUMINUM 3/16 1/2 O.D. RIVET BACKUP WASHER ALUMINUM 3/16 1/2 O.D. SKU: XAS-10 Categories: Fasteners, Rivets They are used when fastening soft materials or to compensate for oversize holes. Washers are .056″-.062″ thick. For hole size 3/16″. Size: 1/2″ round. They are used when fastening soft materials or to compensate for oversize holes. Washers are .056″-.062″ thick. For hole size 3/16″. Size: 1/2″ round. Case Quantity: 500 Log In For Pricing