Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Brass Material Grade/Class Grade 2 Finish Plain For Screw Size M5 Inside Diameter 5.3 mm Outside Diameter 10 mm Maximum Thickness 1 mm System of Measurement Metric Minimum Thickness 1 mm Pack Size Small Pack Thickness Tolerance +/-0.10mm Package Quantity 100