Flat Washer Flat Washer Type SAE Dimensional Standards ASME B18.21.1 SAE Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size 3/4 in Inside Diameter 0.813 in Outside Diameter 1 15/32 in Maximum Thickness 0.134 in System of Measurement Inch Minimum Thickness 0.134 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