SAE Washer Flat Washer Type SAE Dimensional Standards ASME B18.22.1 Material Steel Material Grade/Class Grade 2 Finish Black Oxide For Screw Size #10 Inside Diameter 0.219 in Outside Diameter 1/2 in Maximum Thickness 0.047 in System of Measurement Inch Minimum Thickness 0.047 in Color Clear Inside Diameter Tolerance 0.214-0.227 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C