Flat Washer Flat Washer Type USS Dimensional Standards ASME B18.22.1 Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size 3/4 in Inside Diameter 0.813 in Outside Diameter 2 in Maximum Thickness 0.156 in System of Measurement Inch Minimum Thickness 0.156 in Color Silver Inside Diameter Tolerance 0.806-0.783 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C