Inverted Internal Ring System of Measurement Inch Location Style Internal Thickness 0.042 in Fits Shaft Diameter Not Applicable For Bore Diameter 15/16 in Fits Groove Diameter 1 in Fits Groove Width 0.046 in Fits Groove Depth 0.031 in Free Inside Diameter Not Applicable Free Outside Diameter 1.015 in Clearance Diameter 0.755 in Material Steel Finish Black Phosphate Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type Internal Inverted Ring