Flat Washer Flat Washer Type Standard Dimensional Standards DIN 9021 Material Stainless Steel Material Grade/Class 316 Finish Plain For Screw Size M6 Inside Diameter 6.4 mm Outside Diameter 18 mm Maximum Thickness 1.8 mm System of Measurement Metric Minimum Thickness 1.4 mm Color Silver Inside Diameter Tolerance +0.22 mm Made in North America No Manufacturer Location Globally Sourced Maximum Temperature 302 Degrees F Minimum Temperature -58 Degrees F