National Stock Number
4620-00-253-9502
National Stock Number (NSN) 4620-00-253-9502, or NIIN 002539502, (cell,salinity detector) was assigned July 18, 1969 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 4 manufacturer part numbers associated with this NSN. 3 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 Mar 04, 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: SPE2D114M0059, SPE2D114M0059. The total value of the awarded contracts has been US$ 1,122.00.
This NSN is somewhat common among different platforms, belonging to 6 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 Mar 18, 2011, 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 is a commercial/non-developmental/off-the-shelf-item. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 51178. [A SENSOR DESIGNED TO DETECT THE SALT CONTENT OF WATER BY MEANS OF ELECTRODES. THE ITEM HAS A THREADED FITTING FOR DIRECT PIPE CONNECTION. IT IS ELECTRICALLY CONNECTED TO A PANEL, SALINITY MONITORING SYSTEM, SHIPBOARD THAT MAY ACTIVATE A DUMP VALVE TO DISCHARGE POOR QUALITY WATER. FOR CELLS WITHOUT A VALVE SEE CELL, AND VALVE ASSEMBLY, SALINITY DETECTOR.]. 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 4620002539502 contains an unknown precious metal.
This NSN is associated to Schedule B 8421990040: parts of machinery and apparatus for filtering or purifying water. The Schedule B End Use is listed as food, tobacco machinery. NAICS classification category 333999: all other miscellaneous general purpose machinery manufacturing.
This information was last updated on Jul 01, 2025.