Crown Bolt 20110 5/16 Inch x 1-1/2 Inch Zinc-Plated Steel Fender Washers, 100-Count Zinc-plated 5/16 inch x 1-1/2 inch fender washers For general applications 5/16-inch inner diameter 1-1/2-inch outer diameter Use with nuts and bolts of the same inner diameter and finish