Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Stainless Steel Material Grade/Class 18-8 Finish Plain For Screw Size M3.5 Inside Diameter 3.7 mm Outside Diameter 8 mm Maximum Thickness 0.5 mm System of Measurement Metric Minimum Thickness 0.5 mm Pack Size Small Pack Package Quantity 50