Retaining Ring External 2.5 mm Thk PK5 System of Measurement Metric Location Style External Thickness 2.5 mm Fits Shaft Diameter 68 mm For Bore Diameter Not Applicable Fits Groove Diameter 65 mm Fits Groove Width 2.65 mm Free Inside Diameter 63.5 mm Clearance Diameter 84.8 mm Material Steel Finish Plain Material Grade/Class Ungraded Ring Type External Retaining Ring Clearance Diameter Type Expanded Material Quality Standards DIN 471 Pack Size Small Pack