Poodle Retaining Ring,0.042 In. Thk,PK50, System of Measurement Inch, Location Style External, Thickness 0.042 in, Fits Shaft Diameter 3/8 in, For Bore Diameter Not Applicable, Fits Groove Diameter 0.331 in, Fits Groove Width 0.046 in, Fits Groove Depth 0.022 in, Free Inside Diameter 0.312 in, Free Outside Diameter 0.68 in, Clearance Diameter 0.72 in, Material Steel, Finish Black Phosphate, Material Grade/Class Ungraded, Tensile Strength 150,000 psi, Ring Type Poodle-Style Retaining Ring