Flat Washer Flat Washer Type SAE Dimensional Standards ASME B18.21.1 SAE Material Steel Material Grade/Class Grade 2 Finish Black Oxide For Screw Size 1 in Inside Diameter 1.063 in Outside Diameter 2 in Maximum Thickness 0.134 in System of Measurement Inch Minimum Thickness 0.134 in Color Clear Inside Diameter Tolerance 1.055-1.092 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C