National Stock Number
4720-00-203-3691
National Stock Number (NSN) 4720-00-203-3691, or NIIN 002033691, (hose assembly,air duct,air breathing) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). NIIN 002033691 was cancelled on June 2, 1997, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 4720000556795. This NSN replaces 1 stock number, 1660005417021.
There are no manufacturer part numbers associated to this NSN.
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 4720002033691 does not contain precious metals.
This information was last updated on Jul 01, 2025.