National Stock Number (NSN) 2990-01-577-1498, or NIIN 015771498, (radiator,heater,coolant,engine) was assigned August 27, 2009 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 6 manufacturer part numbers associated with this NSN. 4 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 5 suppliers. Today, 4 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 suppliers are deemed design controlled or valid supply parts. ISO Group has several sources of supply for this NSN.
This part number has been procured by the US Government within the last year, but shows no recent (last 90 days) procurement activity. There have been 32 contracts issued for this part number, with 33 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 5 different suppliers. The last contract numbers awarded were: SPE7L525V1158, SPE7L525V1158, SPE7L525P0196, SPE7L023V0142, SPE7L321F7771. The total value of the awarded contracts has been US$ 2,285,656.66.
This NSN is fairly common among different weapons systems, belonging to 14 different platforms.
There has been a moderate amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Feb 02, 2018, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. This part requires engineering source approval by the design control activity in order to maintain the quality of the part. An alternate source must qualify in accordance with the design control activity's procedures, as approved by the cognizant Government engineering activity. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 46156. [A PREDOMINANTLY METAL ITEM WHICH CAN CONSIST OF TWO INTERLOCKING CYLINDRICAL CASES. THE INNER CYLINDER ACCOMMODATES THE COMBUSTION, CHAMBER HEATER, COOLANT, ENGINE AND CAN BE EQUIPPED WITH RIBS TO ENHANCE THERMAL CONDUCTIVITY. THE HEAT RADIATING FROM THE COMBUSTION CHAMBER IS TRANSMITTED VIA THE WALL AND THE RIBS TO THE COOLANT FLOWING IN THE SPACE BETWEEN THE INNER AND OUTER CYLINDER. CONNECTORS FOR HOSES, TUBES AND ATTACHMENTS CAN BE INCLUDED. EXCLUDES:RADIATOR, VEHICULAR COMPARTMENT HEATER.]. 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 2990015771498 does not contain precious metals.
This NSN is associated to Schedule B 8716900000: parts,nesoi,of trailers and semi-trailers; vehicles,nesoi, not mechanically propelled. The Schedule B End Use is listed as other parts and accessories of vehicles.
This information was last updated on Jul 01, 2025.