Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size M11 Inside Diameter 12 mm Outside Diameter 24 mm Maximum Thickness 2.5 mm System of Measurement Metric Minimum Thickness 2.5 mm Color Silver Inside Diameter Tolerance 0.492-0.503 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C