Inverted Internal Ring System of Measurement Inch Location Style Internal Thickness 0.035 in Fits Shaft Diameter Not Applicable For Bore Diameter 3/4 in Fits Groove Diameter 0.796 in Fits Groove Width 0.039 in Fits Groove Depth 0.023 in Free Inside Diameter Not Applicable Free Outside Diameter 0.808 in Clearance Diameter 0.605 in Material Steel Finish Black Phosphate Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type Internal Inverted Ring