Wedge Lock Washer, Lock Washer Type Wedge Lock, Finish Plain, Material Stainless Steel, For Screw Size M20, Inside Diameter 0.84 in, Outside Diameter 1.54 in, Assembly Thickness 0.13 in, Assembly Thickness Tolerance +/-0.01 in, Color Silver, Dimensional Standards DIN 25201, Material Grade/Class Not Graded, Pack Size Small Pack, Rockwell Hardness HRC52, System of Measurement Metric, Package Quantity 2