Flat Washer Flat Washer Type Standard Dimensional Standards DIN 9021 Material Stainless Steel Material Grade/Class 316 Finish Plain For Screw Size M3 Inside Diameter 3.2 mm Outside Diameter 9 mm Maximum Thickness 0.8 mm System of Measurement Metric Minimum Thickness 0.8 mm Maximum Temperature 302 Degrees F Minimum Temperature -58 Degrees F Pack Size Small Pack Package Quantity 50