Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125 Material Titanium Material Grade/Class Grade 2 Finish Plain For Screw Size M3.5 Inside Diameter 3.7 mm Outside Diameter 8 mm Maximum Thickness 0.6 mm System of Measurement Metric Minimum Thickness 0.4 mm Color Silver Inside Diameter Tolerance +/-0.010 in Material Quality Standards ASTM B348 GR 2 Outside Diameter Tolerance +/-0.010 in Pack Size Small Pack