Flat Washer Flat Washer Type Oversized Dimensional Standards ASME B18.21.1 Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size 9/16 in Inside Diameter 0.625 in Outside Diameter 1 15/32 in Maximum Thickness 0.109 in System of Measurement Inch Minimum Thickness 0.109 in Color Silver Inside Diameter Tolerance 0.62-0.64 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C