Flat Washer Flat Washer Type Oversized Dimensional Standards ASME B18.22.1 Material Steel Material Grade/Class Class 10.9 Finish Zinc Yellow For Screw Size 9/16 in Inside Diameter 0.594 in Outside Diameter 1 5/32 in Maximum Thickness 0.172 in System of Measurement Inch Minimum Thickness 0.172 in Color Yellow Inside Diameter Tolerance 0.589-0.609 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards ASTM A-325 Maximum Temperature 350 Degrees C