Inverted Internal Ring System of Measurement Inch Location Style Internal Thickness 0.025 in Fits Shaft Diameter Not Applicable For Bore Diameter 5/8 in Fits Groove Diameter 0.665 in Fits Groove Width 0.029 in Fits Groove Depth 0.02 in Free Inside Diameter Not Applicable Free Outside Diameter 0.675 in Clearance Diameter 0.51 in Material Steel Finish Black Phosphate Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type Internal Inverted Ring