A round or oval part and either a d-shaped or a heart-shaped part mounted on a common axis so as to permit relative rotation between the parts.
NSN 6105-01-029-3582
NSN 2925-01-049-8906
NSN 6145-00-985-8348
NSN 5925-01-281-3041
NSN 5935-01-427-9583
NSN 6240-01-390-2597
NSN 5925-00-267-3044
NSN 6650-01-516-3631
NSN 5930-00-591-8918
NSN 2925-01-197-7864
NSN 6150-01-476-8094
NSN 6105-01-416-4029