Retaining Ring External 2 mm Thk PK25 System of Measurement Metric Location Style External Thickness 2 mm Fits Shaft Diameter 52 mm For Bore Diameter Not Applicable Fits Groove Diameter 49 mm Fits Groove Width 2.15 mm Free Inside Diameter 47.8 mm Clearance Diameter 66.7 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