Wedge Lock Washer Lock Washer Type Wedge Lock Finish Delta Protect Material Steel For Screw Size 1 3/4 in Inside Diameter 1.82 in Outside Diameter 2.76 in Assembly Thickness 0.28 in Assembly Thickness Tolerance +/-0.03 in Dimensional Standards DIN 25201 Material Grade/Class Not Graded Pack Size Small Pack Rockwell Hardness HRC46 System of Measurement Inch