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 5925-00-807-4305
NSN 6620-01-072-1034
NSN 6685-00-114-8787
NSN 6685-00-321-3634
NSN 5950-01-221-0919
NSN 5950-01-272-2679
NSN 5915-01-256-6128
NSN 6105-01-298-1825
NSN 6135-00-377-9165
NSN 5975-00-339-3313
NSN 5905-00-554-4325
NSN 6240-01-361-9167