Basic External Ring System of Measurement Inch Location Style External Thickness 0.078 in Fits Shaft Diameter 2 1/16 in For Bore Diameter Not Applicable Fits Groove Diameter 1.946 in Fits Groove Width 0.086 in Fits Groove Depth 0.058 in Free Inside Diameter 1.906 in Free Outside Diameter Not Applicable Clearance Diameter 2.572 in Material Steel Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type External Ring Thickness Tolerance +/-0.003 in