Duty Retaining Ring 0.078 in Thk PK10 System of Measurement Inch Location Style External Thickness 0.078 in Fits Shaft Diameter 7/8 in For Bore Diameter Not Applicable Fits Groove Diameter 0.821 in Fits Groove Width 0.086 in Fits Groove Depth 0.027 in Free Inside Diameter 0.804 in Clearance Diameter 1.25 in Material Steel Finish Black Phosphate Material Grade/Class Ungraded Tensile Strength 150 000 psi Ring Type External Retaining Ring Clearance Diameter Type Expanded