Flat Washer Flat Washer Type Oversized Material Steel Material Grade/Class Grade 2 Finish Zinc Plated For Screw Size M12 Inside Diameter 12.5 mm Outside Diameter 30 mm Maximum Thickness 2 mm System of Measurement Metric Minimum Thickness 2 mm Color Silver Maximum Temperature 302 Degrees F Minimum Temperature -58 Degrees F Pack Size Small Pack Package Quantity 100