Retaining Ring,External,1 mm Thk,PK50, System of Measurement Metric, Location Style External, Thickness 1 mm, Fits Shaft Diameter 13 mm, For Bore Diameter Not Applicable, Fits Groove Diameter 12.4 mm, Fits Groove Width 1.1 mm, Free Inside Diameter 11.9 mm, Clearance Diameter 20.2 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