Split Lock Washer Lock Washer Type Split Lock Finish Blue Phosphate Material Steel For Screw Size M6 Inside Diameter 6.5 mm Outside Diameter 9.5 mm Maximum Thickness 1.6 mm Minimum Thickness 1.6 mm Color Blue Dimensional Standards DIN 7980 Material Grade/Class Not Graded Pack Size Small Pack Rockwell Hardness HRC44 System of Measurement Metric Thickness Tolerance +/-0.100 mm Package Quantity 100