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 5996-01-084-2054
NSN 2925-01-592-5578
NSN 5999-01-501-0694
NSN 4140-00-459-1564
NSN 5935-01-553-1111
NSN 5925-00-477-2703
NSN 6130-01-437-3529
NSN 6620-01-490-5664
NSN 5915-01-244-6772
NSN 5985-01-108-3636
NSN 6320-01-213-3974
NSN 5950-00-450-2395