Flat Washer Flat Washer Type Standard Dimensional Standards DIN 9021 Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size M3.5 Inside Diameter 3.7 mm Outside Diameter 11 mm Maximum Thickness 0.8 mm System of Measurement Metric Minimum Thickness 0.8 mm Color Silver Made in North America No Manufacturer Location Globally Sourced Material Quality Standards Not Rated Maximum Temperature 350 Degrees C Minimum Temperature -58 Degrees C Pack Size Small Pack