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 6110-01-641-7958
NSN 5905-01-249-2206
NSN 5950-01-415-0276
NSN 5999-01-409-0723
NSN 5855-00-610-4052
NSN 5915-00-530-5067
NSN 5965-00-939-4495
NSN 5945-01-630-7378
NSN 5835-01-589-4735
NSN 5965-01-441-9505
NSN 5905-01-526-8094
NSN 5999-01-325-6777