Reinforced E-Style Ring System of Measurement Inch Location Style External Thickness 0.042 in Fits Shaft Diameter 9/16 in For Bore Diameter Not Applicable Fits Groove Diameter 0.437 in Fits Groove Width 0.046 in Fits Groove Depth 0.062 in Free Inside Diameter 0.43 in Free Outside Diameter 0.87 in Clearance Diameter 0.89 in Material Steel Finish Black Phosphate Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type Reinforced E-Style Ring