VHO-143SS, 1-7/16 In. Diameter, 0.05 Thick, Internal Beveled Retaining Ring in Stainless Steel PH15-7, Plain Manufactured by Rotor Clip
Internal beveled rings look exactly like the basic internal rings, only they have a 15* angle on the outer edge. This combines with a complementary groove angle to eliminate end play by wedging itself between the groove and the retained part.