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 6650-01-437-8852
NSN 7035-01-068-4175
NSN 5945-01-634-0588
NSN 5996-01-061-6894
NSN 5925-01-646-1742
NSN 5920-01-467-2079
NSN 6110-01-221-4062
NSN 6150-01-062-9819
NSN 5855-01-072-0410
NSN 4140-01-558-4047
NSN 6685-01-374-4911
NSN 6135-01-542-5902