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 5985-01-207-7883
NSN 5915-01-477-4647
NSN 4140-01-136-5530
NSN 5920-00-024-0127
NSN 7035-01-359-6108
NSN 5930-00-501-8871
NSN 6220-01-040-5653
NSN 5996-00-475-9778
NSN 5915-01-065-0413
NSN 6645-01-311-9794
NSN 5855-00-797-8217
NSN 5915-01-456-7988