Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Steel Material Grade/Class Class 8.8 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 1.339-1.363 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards ASTM A-325 Maximum Temperature 350 Degrees C