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 1 1/8 in Inside Diameter 1.25 in Outside Diameter 2 1/4 in Maximum Thickness 0.134 in System of Measurement Inch Minimum Thickness 0.134 in Color Silver Inside Diameter Tolerance 1.243-1.28 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C