Wedge Lock Washer, Lock Washer Type Wedge Lock, Finish Delta Protect, Material Steel, For Screw Size 1 1/2 in, Inside Diameter 1.59 in, Outside Diameter 2.3 in, Assembly Thickness 0.26 in, Assembly Thickness Tolerance +/-0.02 in, Color Silver, Dimensional Standards DIN 25201, Material Grade/Class Not Graded, Pack Size Small Pack, Rockwell Hardness HRC46, System of Measurement Metric