Two or more different items having a common mounting or mounted on each other which together form a portion of a tachometer (as modified), but which in itself is not a complete functioning item and cannot be assigned a more definite item name.
NSN 6105-01-287-5500
NSN 5999-01-545-8704
NSN 6240-00-167-2467
NSN 5905-00-375-6342
NSN 5895-01-234-8091
NSN 6320-01-532-6746
NSN 6240-01-255-5080
NSN 5835-01-268-1924
NSN 6105-00-115-2858
NSN 5930-01-496-0999
NSN 5915-00-932-6371
NSN 6650-01-145-5663