Flat Washer Flat Washer Type Standard Dimensional Standards DIN 9021 Material Steel Material Grade/Class Grade 2 Finish Zinc Yellow For Screw Size M7 Inside Diameter 7.4 mm Outside Diameter 22 mm Maximum Thickness 2 mm System of Measurement Metric Minimum Thickness 2 mm Color Yellow Inside Diameter Tolerance 0.291-0.3 Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C