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 5905-00-935-9540
NSN 5945-01-334-3886
NSN 6240-00-170-5302
NSN 7035-01-537-6016
NSN 2925-01-656-8217
NSN 5998-01-411-5742
NSN 6150-00-593-5199
NSN 5835-00-451-2982
NSN 2925-00-526-4541
NSN 5999-01-175-5192
NSN 6610-01-416-8384
NSN 5920-01-423-8595