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 5990-00-562-8413
NSN 5975-00-553-7151
NSN 6150-01-082-4074
NSN 5960-00-832-8449
NSN 6610-00-583-1084
NSN 6610-00-603-4650
NSN 5925-01-152-2690
NSN 5945-01-226-6075
NSN 5930-00-283-4250
NSN 5935-00-293-1863
NSN 5950-00-736-9484
NSN 6320-01-116-3980