Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size M48 Inside Diameter 50 mm Outside Diameter 92 mm Maximum Thickness 8 mm System of Measurement Metric Minimum Thickness 8 mm Color Silver Inside Diameter Tolerance 1.969-1.993 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C