National Stock Number
2990-01-598-8578
National Stock Number (NSN) 2990-01-598-8578, or NIIN 015988578, (sensor,engine coolant temperature,emission control) was assigned August 30, 2011 in the Federal Logistics Information System (FLIS). NIIN 015988578 was cancelled on July 2, 2018, with a cancelled status of "Item is Cancelled WITHOUT Replacement." There is no known replacement specified for this stock number. This NSN does not replace any other NSNs.
There are 2 manufacturer part numbers associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 suppliers are listed as Active suppliers 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, with the most recent procurement date of Jun 19, 2014. 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: SPE7L214V3692. The total value of the awarded contracts has been US$ 1,164.40.
This NSN is somewhat common among different platforms, belonging to 2 different weapons systems.
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 May 14, 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) 39921. [A METALLIC AND/OR NON-METALLIC DEVICE WITH VARIOUS PORTS ON ONE END AND A WRENCHING FACILITY BETWEEN ENDS. THE OPPOSITE END MAY BE THREADED AND CONTAIN A TEMPERATURE PROBE. IT IS NORMALLY LOCATED ON THE UPPER ENGINE BLOCK, ON THE WATER JACKET OR SCREWED INTO THE UPPER RADIATOR TANK. DEPENDING ON INDIVIDUAL TEMPERATURE CALIBRATION IT OPENS OR CLOSES VARIOUS PORTS IN ORDER TO CHANNEL MANIFOLD VACUUM TO DEVICES WHICH ACTIVATE, DE-ACTIVATE OR MODIFY FUNCTIONS IN FUEL ECONOMY, COLD TEMPERATURE OVERRIDE, THERMAL IGNITION CONTROL, EXHAUST GAS RECIRCULATION AND OTHER SYSTEMS BY SENSING ENGINE WATER TEMPERATURE.]. 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 2990015988578 does not contain precious metals.
This information was last updated on Aug 01, 2025.