VHO-425ST PA, 4-1/4 In. Diameter, 0.109 Thick, Internal Beveled Retaining Ring in Carbon Steel, Phosphate 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.