Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Stainless Steel Material Grade/Class 316 Finish Plain For Screw Size M27 Inside Diameter 28 mm Outside Diameter 50 mm Maximum Thickness 4 mm System of Measurement Metric Minimum Thickness 4 mm Maximum Temperature 302 Degrees F Minimum Temperature -58 Degrees F Pack Size Small Pack Package Quantity 5