National Stock Number
2840-00-403-1970
National Stock Number (NSN) 2840-00-403-1970, or NIIN 004031970, (duct,combustion chamber,aircraft gas turbine engine) was assigned June 5, 1970 in the Federal Logistics Information System (FLIS). NIIN 004031970 was cancelled on December 18, 2002, 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, there are no suppliers that are 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) 52524. [A CYLINDRICAL SHAPED ITEM OR A SEGMENT THEREOF DESIGNED TO DIRECT AIR INTO OR AROUND A CHAMBER, COMBUSTION, AIRCRAFT GAS TURBINE ENGINE. THE INTERNAL IAR IS DIVIDED AND DIRECTED TO THE BURNING CHAMBER(S). THE EXTERNAL AIR IS USED FOR COOLING PURPOSES.]. This item does not have a nuclear hardened feature but does have other critical feature(s) 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 2840004031970 does not contain precious metals.
This information was last updated on Aug 01, 2025.