Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Steel Material Grade/Class Grade 2 Finish Black Oxide For Screw Size M72 Inside Diameter 74.3 mm Outside Diameter 123.7 mm Maximum Thickness 9.75 mm System of Measurement Metric Minimum Thickness 9.75 mm Color Clear Inside Diameter Tolerance 2.913-2.943 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C