Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125-1A Material Steel Material Grade/Class Grade 5 Finish Zinc Yellow For Screw Size M11 Inside Diameter 12 mm Outside Diameter 24 mm Maximum Thickness 2.5 mm System of Measurement Metric Minimum Thickness 2.5 mm Maximum Temperature 302 Degrees F Minimum Temperature -58 Degrees F Pack Size Small Pack Package Quantity 50