National Stock Number
5821-00-558-6503
National Stock Number (NSN) 5821-00-558-6503, or NIIN 005586503, (switchboard,signal distribution,) was assigned November 11, 1974 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. Today, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts.
This part number has not been procured by the US Government in over 5 years.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Apr 02, 1991, this NSN's acquisition method was noted as: Not established. Not established.
This NSN is assigned to Item Name Code (INC) 26947. [A DEVICE WHICH, IN ASSOCIATION WITH A CONTROL KEYER, AUDIO LINES, AND A SWITCHBOARD TIED BY AIR-TO-GROUND MULTIPLEX CHANNELS, PROVIDES AN AIR-TO-AIR OR AIR-TO-GROUND AUTOMATIC SWITCHING FACILITY, HAVING THE CAPABILITY OF DETECTING INBAND TONES AND USING THIS TO KEY RADIO SETS.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 5821005586503 does not contain precious metals.
This NSN is associated to Schedule B 8529906000: parts for apparatus of headings 8525 to 8528, nesoi. The Schedule B End Use is listed as telecommunications equipment. NAICS classification category 334419: other electronic component manufacturing.
This information was last updated on Jul 01, 2025.