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 6130-01-477-8941
NSN 6150-01-482-0072
NSN 5915-01-061-8740
NSN 5915-01-568-2419
NSN 6620-01-445-4295
NSN 5960-01-505-2426
NSN 4140-01-661-2116
NSN 6610-00-147-3187
NSN 6610-00-802-8057
NSN 5965-00-236-0016
NSN 5999-01-497-9521
NSN 5945-00-457-8964