Plain Washer Flat Washer Type Standard Dimensional Standards DIN 433 Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size M2 Inside Diameter 2.2 mm Outside Diameter 4 1/2 mm Maximum Thickness 0.3 mm System of Measurement Metric Minimum Thickness 0.3 mm Maximum Temperature 302 Degrees F Minimum Temperature -58 Degrees F Pack Size Small Pack Package Quantity 100