Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size M45 Inside Diameter 46 mm Outside Diameter 85 mm Maximum Thickness 7 mm System of Measurement Metric Minimum Thickness 7 mm Color Silver Inside Diameter Tolerance 1.811-1.835 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C