National Stock Number
2990-01-376-5662
National Stock Number (NSN) 2990-01-376-5662, or NIIN 013765662, (combustion chamber,heater coolan) was assigned June 5, 1993 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 3 manufacturer part numbers associated with this NSN. 3 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 6 suppliers. Today, 5 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 3 suppliers 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 unique to one weapons system.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jan 02, 2013, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. The data or the rights to use the data needed to purchase this part from additional sources are not owned by the Government and it has been determined that it is uneconomical to purchase them. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 45876. [AN ITEM GENERALLY TUBULAR SHAPED, THE FUEL INJECTED THROUGH A NOZZLE IS ATOMIZED, MIXED WITH COMBUSTION AIR AND BURNT. THE RESULTING HEAT IS USED TO HEAT THE COOLANT. ITEM IS PART OF A HEATER (1), COOLANT, ENGINE.]. 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 2990013765662 does not contain precious metals.
This information was last updated on Aug 01, 2025.