Lock Washer Lock Washer Type External Tooth Lock Finish Zinc Plated Material Spring Steel For Screw Size M3 Inside Diameter 3.2 mm Outside Diameter 6 mm Maximum Thickness 0.4 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