Poodle Retaining Ring 0.05 in Thk PK50 System of Measurement Inch Location Style External Thickness 0.05 in Fits Shaft Diameter 5/8 in For Bore Diameter Not Applicable Fits Groove Diameter 0.44 in Fits Groove Width 0.056 in Fits Groove Depth 0.03 in Free Inside Diameter 0.5 in Free Outside Diameter 0.966 in Clearance Diameter 1.03 in Material Steel Finish Black Phosphate Material Grade/Class Ungraded Tensile Strength 150 000 psi Ring Type Poodle-Style Retaining Ring