Wedge Lock Washer Lock Washer Type Wedge Lock Finish Delta Protect Material Steel For Screw Size 1 3/8 in Inside Diameter 1.47 in Outside Diameter 2.17 in Assembly Thickness 0.26 in Assembly Thickness Tolerance +/-0.02 in Dimensional Standards DIN 25201 Material Grade/Class Not Graded Pack Size Small Pack Rockwell Hardness HRC46 System of Measurement Inch Package Quantity 25