Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Steel Material Grade/Class Grade 2 Finish Black Oxide For Screw Size M58 Inside Diameter 60 mm Outside Diameter 110 mm Maximum Thickness 9 mm System of Measurement Metric Minimum Thickness 9 mm Color Clear Inside Diameter Tolerance 2.362-2.391 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C