Flat Washer Flat Washer Type Standard Dimensional Standards ASME B18.22.1 Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size #2 Inside Diameter 0.094 in Outside Diameter 1/4 in Maximum Thickness 0.031 in System of Measurement Inch Minimum Thickness 0.031 in Color Silver Inside Diameter Tolerance 0.089-0 094 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C