Retaining Ring,Internal,1 mm Thk,PK100, System of Measurement Metric, Location Style Internal, Thickness 1 mm, Fits Shaft Diameter Not Applicable, For Bore Diameter 12 mm, Fits Groove Diameter 12.5 mm, Fits Groove Width 1.1 mm, Free Outside Diameter 13 mm, Clearance Diameter 4.9 mm, Material Steel, Finish Plain, Material Grade/Class Ungraded, Ring Type Housing Ring, Clearance Diameter Type Compressed, Material Quality Standards DIN 472, Pack Size Small Pack