USS Washer Flat Washer Type USS Dimensional Standards ASME B18.21.1 Material Steel Material Grade/Class Grade 2 Finish Hot Dipped Galvanized For Screw Size 5/8 in Inside Diameter 0.688 in Outside Diameter 1 3/4 in Maximum Thickness 0.141 in System of Measurement Inch Minimum Thickness 0.141 in Color Silver Inside Diameter Tolerance 0.681-0.718 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C