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 1 3/8 in Inside Diameter 1.5 in Outside Diameter 3 1/4 in Maximum Thickness 0.18 in System of Measurement Inch Minimum Thickness 0.18 in Color Yellow Inside Diameter Tolerance 1.49-1.545 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards ASTM A-325 Maximum Temperature 350 Degrees C