An item for connecting two sets of grooves/keys (as of different diameters), changing groove/key size and/or spacing, or for changing groove/key configuration for uses not originally intended.
NSN 5925-00-451-2061
NSN 6110-00-438-6686
NSN 6320-00-908-6841
NSN 6220-00-225-8345
NSN 6150-00-174-5029
NSN 6685-01-063-7004
NSN 5945-01-360-8520
NSN 5960-01-013-9346
NSN 6150-00-939-8961
NSN 5996-00-173-5706
NSN 5910-01-167-0331
NSN 5960-01-632-6576