5805-00-411-7214 (221-6)
5805-00-411-7214 is equivalent to manufacture part number 221-6. It is a tone keyer shelf and is classified under Federal Supply Class 5805 (5805 - Telephone and Telegraph Equipment), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 5805 - Telephone and Telegraph Equipment and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.