Inverted External Ring System of Measurement Inch Location Style External Thickness 0.062 in Fits Shaft Diameter 1 5/8 in For Bore Diameter Not Applicable Fits Groove Diameter 1.529 in Fits Groove Width 0.068 in Fits Groove Depth 0.048 in Free Inside Diameter 1.503 in Clearance Diameter 1.93 in Material Steel Finish Black Phosphate Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type External Inverted Ring Thickness Tolerance +/-0.003 in