Retaining Ring,External,0.031 In. Thk,PK25, System of Measurement Inch, Location Style External, Thickness 0.031 in, Fits Shaft Diameter 1/2 in, For Bore Diameter 1/2 in, Fits Groove Diameter 0.563 in, Fits Groove Width 0.05 in, Fits Groove Depth 0.312 in, Free Inside Diameter 0.567 in, Free Outside Diameter 0.937 in, Clearance Diameter Not Applicable, Material Steel, Finish Zinc Plated, Material Grade/Class Grade 1050/Grade 1065, Tensile Strength 150,000 psi, Ring Type Retaining Ring Cap