Part# C-25SS Stainless Steel, Passivated Manufactured by Rotor Clip 0.25 In. Shaft Diameter, Crescent C-Style External Ring 0.311 In. Free Outside Diameter 0.211 In. Free Inside Diameter 0.025 In. Thick 0.22 In. Groove Diameter 0.029 In. Groove Width 0.015 In. Groove Depth