Lock Washer Lock Washer Type External Tooth Lock Finish Zinc Plated Material Spring Steel For Screw Size M10 Inside Diameter 10.5 mm Outside Diameter 18 mm Maximum Thickness 0.9 mm Color Silver Dimensional Standards DIN 6797 A Material Grade/Class Not Graded Material Quality Standards 350-425 HV10 Pack Size Small Pack System of Measurement Metric Package Quantity 100