Wedge Lock Washer Lock Washer Type Wedge Lock Finish Delta Protect Material Steel For Screw Size 1 in Inside Diameter 1.1 in Outside Diameter 1.91 in Assembly Thickness 0.18 in Assembly Thickness Tolerance +/-0.01 in Dimensional Standards DIN 25201 Material Grade/Class Not Graded Pack Size Small Pack Rockwell Hardness HRC46 System of Measurement Inch Package Quantity 50