Flat Washer Flat Washer Type Standard Dimensional Standards DIN 9021 Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size M36 Inside Diameter 39 mm Outside Diameter 110 mm Maximum Thickness 8 mm System of Measurement Metric Minimum Thickness 8 mm Color Silver Inside Diameter Tolerance 1.535-1.575 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C