Flat Washer Flat Washer Type SAE Dimensional Standards ASME B18.22.1 Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size 9/16 in Inside Diameter 0.594 in Outside Diameter 1 13/16 in Maximum Thickness 0.094 in System of Measurement Inch Minimum Thickness 0.094 in Color Silver Inside Diameter Tolerance 0.589-0.609 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C