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 2925-01-400-2286
NSN 4140-01-297-5148
NSN 5915-00-244-2835
NSN 5835-01-120-5079
NSN 6150-01-367-5098
NSN 6150-01-533-7488
NSN 5930-01-068-2710
NSN 5998-01-065-1832
NSN 5935-01-220-7318
NSN 5950-01-076-7515
NSN 6610-01-139-0174
NSN 6145-01-641-7703