Lock Washer Lock Washer Type External Tooth Lock Finish Zinc Plated Material Spring Steel For Screw Size M2.5 Inside Diameter 2.7 mm Outside Diameter 5.5 mm Maximum Thickness 0.4 mm Color Silver Dimensional Standards DIN 6798 A Material Grade/Class Not Graded Material Quality Standards 350-425 HV10 Pack Size Small Pack System of Measurement Metric Package Quantity 100