Retaining Ring,External,2 mm Thk,PK10, System of Measurement Metric, Location Style External, Thickness 2 mm, Fits Shaft Diameter 54 mm, For Bore Diameter Not Applicable, Fits Groove Diameter 51 mm, Fits Groove Width 2.15 mm, Free Inside Diameter 49.8 mm, Clearance Diameter 67 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