Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size M5 Inside Diameter 5.3 mm Outside Diameter 10 mm Maximum Thickness 1 mm System of Measurement Metric Minimum Thickness 1 mm Color Silver Inside Diameter Tolerance 0.209-0.216 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C