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 6110-00-250-7913
NSN 6240-01-435-4854
NSN 6105-01-350-0016
NSN 5920-01-463-3525
NSN 5965-01-514-7231
NSN 5960-01-363-4992
NSN 5945-00-919-8494
NSN 5930-01-525-5744
NSN 5996-01-476-2131
NSN 4140-00-660-8699
NSN 6150-00-201-6175
NSN 5925-01-539-6974