Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size M52 Inside Diameter 54 mm Outside Diameter 98 mm Maximum Thickness 8 mm System of Measurement Metric Minimum Thickness 8 mm Color Silver Inside Diameter Tolerance 2.126-2.155 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C