Wedge Lock Washer, Lock Washer Type Wedge Lock, Finish Plain, Material Stainless Steel, For Screw Size 2 1/2 in, Inside Diameter 2.64 in, Outside Diameter 3.74 in, Assembly Thickness 0.35 in, Assembly Thickness Tolerance +/-0.03 in, Dimensional Standards DIN 25201, Material Grade/Class 316, Pack Size Small Pack, Rockwell Hardness HRC52, System of Measurement Inch