USS Washer, Flat Washer Type USS, Dimensional Standards ASME B18.21.1, Material Stainless Steel, Material Grade/Class 18-8, Finish Plain, For Screw Size 5/8 in, Inside Diameter 0.688 in, Outside Diameter 1 3/4 in, Maximum Thickness 5/32 in, System of Measurement Inch, Minimum Thickness 7/64 in, Color Silver, Inside Diameter Tolerance +0.030 in ; -0.007 in, Made in North America Not Made in North America, Manufacturer Location Globally Sourced, Material Quality Standards Not Rated