SAE Washer, Flat Washer Type SAE, Dimensional Standards ASME B18.21.1, Material Steel, Material Grade/Class Case Hardened, Finish Zinc-Plated, For Screw Size 9/16 in, Inside Diameter 0.594 in, Outside Diameter 1 5/32 in, Maximum Thickness 1/8 in, System of Measurement Inch, Minimum Thickness 5/64 in, Color Silver, Inside Diameter Tolerance 0.589-0.609, Made in North America Not Made in North America, Manufacturer Location Globally Sourced, Material Quality Standards Not Rated