Retaining Ring,Internal,0.015 In. Thk,PK50, System of Measurement Not Applicable, Location Style Internal, Thickness 0.015 in, Fits Shaft Diameter Not Applicable, For Bore Diameter 1/4 in, Fits Groove Diameter 0.268 in, Fits Groove Width 0.02 in, Fits Groove Depth Not Applicable, Free Inside Diameter Not Applicable, Free Outside Diameter 0.28 in, Clearance Diameter 0.25 in, Material Steel, Finish Plain, Material Grade/Class Ungraded, Tensile Strength Not Applicable, Ring Type Retaining Ring