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 5945-01-361-9116
NSN 5895-01-467-2513
NSN 6220-00-964-1042
NSN 6650-01-645-2850
NSN 6650-00-952-4500
NSN 5985-00-509-8644
NSN 6240-01-225-1183
NSN 5895-00-834-1151
NSN 4140-01-504-8326
NSN 6135-00-078-9931
NSN 6650-01-499-5673
NSN 5925-01-044-5508