Fender Washer Flat Washer Type Oversized Dimensional Standards ASME B18.21.1 Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size 5/16 in Inside Diameter 0.344 in Outside Diameter 1 5/8 in Maximum Thickness 0.065 in System of Measurement Inch Minimum Thickness 0.065 in Color Silver Inside Diameter Tolerance 0 338-0 358 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C