Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size M56 Inside Diameter 58 mm Outside Diameter 105 mm Maximum Thickness 9 mm System of Measurement Metric Minimum Thickness 9 mm Color Silver Inside Diameter Tolerance 2.283-2.313 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C