USS Washer Flat Washer Type USS Dimensional Standards ASME B18.22.1 Material Steel Material Grade/Class Class 10.9 Finish Zinc Yellow For Screw Size 7/8 in Inside Diameter 0.938 in Outside Diameter 2 1/4 in Maximum Thickness 0.165 in System of Measurement Inch Minimum Thickness 0.165 in Color Yellow Inside Diameter Tolerance 0.931-0.968 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards ASTM A-325 Maximum Temperature 350 Degrees C