Spiral Retaining Ring,0.035 In. Thk,PK25, System of Measurement Inch, Location Style Internal, Thickness 0.035 in, Fits Shaft Diameter Not Applicable, For Bore Diameter 1/2 in, Fits Groove Diameter 0.461 in, Fits Groove Width 0.029 in, Fits Groove Depth 0.015 in, Free Outside Diameter 0.538 in, Material Steel, Finish Plain, Material Grade/Class Ungraded, Tensile Strength 221,000 psi, Ring Type Spiral Retaining Ring, Material Quality Standards ANSI, Pack Size Small Pack