Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Stainless Steel Material Grade/Class 316 Finish Plain For Screw Size M1.6 Inside Diameter 1.7 mm Outside Diameter 4 mm Maximum Thickness 0.3 mm System of Measurement Metric Minimum Thickness 0.3 mm Maximum Temperature 302 Degrees F Minimum Temperature -58 Degrees F Pack Size Small Pack Package Quantity 50