National Stock Number
1660-00-424-9665
National Stock Number (NSN) 1660-00-424-9665, or NIIN 004249665, (hose assembly,air duct,air breathing) was assigned April 9, 1971 in the Federal Logistics Information System (FLIS). NIIN 004249665 was cancelled on April 30, 2010, with a cancelled status of "Item is Cancelled - Inactive." There is no known replacement specified for this stock number. 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.
This NSN is assigned to Item Name Code (INC) 30600. [A LENGTH OF HOSE, AIR DUCT, AIR BREATHING WHICH MAY HAVE END COUPLINGS ON ONE OR BOTH END/OR INCORPORATES A COMMUNICATION CABLE. IT IS DESIGNED FOR USE IN BREATHING OXYGEN SYSTEM, AIR LINE MASKS, GAS MASKS, AND THE LIKE. EXCLUDES:ITEMS WHICH INCLUDE THE BRANCH OR FORK HOSES; ASSEMBLIES MADE UP OF THE OXYGEN BREATHING HOSE, COMMUNICATION CABLE, WIRING FOR FACE MASK HEATER, AND VENT AND PRESSURE DUCTS FOR THE ANTI-GSUIT AND HOSE ASSEMBLY, NONMETALLIC.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 1660004249665 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.