Flat Washer Flat Washer Type Standard Dimensional Standards DIN 9021 Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size M33 Inside Diameter 34 mm Outside Diameter 60 mm Maximum Thickness 5 mm System of Measurement Metric Minimum Thickness 5 mm Color Silver Inside Diameter Tolerance 1.417-1.457 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C