Lock Washer Lock Washer Type Internal Tooth Lock Finish Zinc Plated Material Spring Steel For Screw Size M7 Inside Diameter 7.4 mm Outside Diameter 12.5 mm Maximum Thickness 0.8 mm Color Silver Dimensional Standards DIN 6798 J Material Grade/Class Not Graded Material Quality Standards 350-425 HV10 Pack Size Small Pack System of Measurement Metric Package Quantity 100