Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Steel Material Grade/Class Grade 5 Finish Zinc Yellow 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 Maximum Temperature 302 Degrees F Minimum Temperature -58 Degrees F Pack Size Small Pack Package Quantity 100