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 6150-01-202-1005
NSN 6645-01-316-4900
NSN 6320-01-021-6633
NSN 6110-00-058-6732
NSN 5915-00-310-3156
NSN 6645-01-280-0252
NSN 4140-00-633-7540
NSN 2925-01-273-4898
NSN 6145-01-435-5700
NSN 5975-00-035-6524
NSN 5920-01-046-7033
NSN 5965-01-474-0188