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 6220-01-504-9892
NSN 5855-01-371-6790
NSN 5950-01-245-8545
NSN 6610-01-170-8318
NSN 5855-01-437-3630
NSN 5855-01-088-8700
NSN 5905-01-299-0812
NSN 5960-01-495-0859
NSN 6220-00-731-6084
NSN 5985-00-859-3451
NSN 5895-01-444-2768
NSN 6105-01-130-5901