Flat Washer Flat Washer Type Oversized Dimensional Standards ASME B18.21.1 Material Steel Material Grade/Class Grade 2 Finish Hot Dipped Galvanized For Screw Size 3/4 in Inside Diameter 0.813 in Outside Diameter 2 in Maximum Thickness 0.148 in System of Measurement Inch Minimum Thickness 0.148 in Color Silver Inside Diameter Tolerance 0.805-0.842 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C