Inverted Internal Ring System of Measurement Inch Location Style Internal Thickness 0.042 in Fits Shaft Diameter Not Applicable For Bore Diameter 13/16 in Fits Groove Diameter 0.862 in Fits Groove Width 0.046 in Fits Groove Depth 0.025 in Free Inside Diameter Not Applicable Free Outside Diameter 0.877 in Clearance Diameter 0.665 in Material Steel Finish Black Phosphate Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type Internal Inverted Ring