National Stock Number
2990-01-622-6538
National Stock Number (NSN) 2990-01-622-6538, or NIIN 016226538, (radiator,heater,coolant,engine) was assigned October 17, 2013 in the Federal Logistics Information System (FLIS). NIIN 016226538 was cancelled on September 2, 2016, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 2930016035090. This NSN does not replace any other NSNs.
There are 2 manufacturer part numbers associated with this NSN. One of those 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, with the most recent procurement date of Aug 27, 2015. There has been one contract issued for this part number, with one award given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPE7L215V4496, SPE7L215V4496. The total value of the awarded contracts has been US$ 1,422.27.
There has been very little 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 Aug 25, 2020, 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 needed to produce this item from additional sources is not physically available. Valid AMCs: 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 2990016226538 does not contain precious metals.
This information was last updated on Aug 01, 2025.