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 6220-01-516-8996
NSN 5999-00-798-0261
NSN 6650-00-393-0447
NSN 5920-01-641-5469
NSN 6145-00-914-1704
NSN 6240-01-397-0704
NSN 6645-00-441-8008
NSN 5985-00-964-7692
NSN 5895-00-986-1599
NSN 6620-01-497-3744
NSN 5935-01-250-3121
NSN 6145-01-113-1366