National Stock Number (NSN) 4820-00-845-8013, or NIIN 008458013, (valve,weighted control,piston) was assigned December 30, 1966 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. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 3 suppliers. Today, 3 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 suppliers 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 Oct 11, 2011. There have been 4 contracts issued for this part number, with 3 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 4 different suppliers. The last contract numbers awarded were: SPM7M212M0025, SPM7M011MV167, SPM7M211M2918, SPM7M210MV086. The total value of the awarded contracts has been US$ 2,419.34.
This NSN is somewhat common among different platforms, belonging to 3 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 Apr 25, 2008, 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 annual buy value of this part falls below the screening threshold of $10,000 but it has been screened for known source(s). (NOTE: This code shall not be used when screening parts entering the inventory. It shall not be assigned in preference to or supersede any other AMSC.) Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 16994. [A VALVE CONSISTING OF A PORTED, DEAD WEIGHTED, HOLLOW PISTON WHICH MOVES VERTICALLY ACROSS THE INLET PASSAGE WITHIN THE VALVE BODY. CHANGES IN THE PRESSURE CONTROLLED POSITION OF THE PISTON VARY THE EFFECTIVE AREA OF THE PORTS EXPOSED TO THE INLET FLOW IN SUCH A MANNER AS TO MAINTAIN A CONSTANT OUTLET LINE PRESSURE. IT HAS NO SEATS OR DISK. FOR DEAD WEIGHT LOADED PRESSURE REGULATING VALVE OF SEAT AND DISK CONSTRUCTION, SEE ALSO VALVE, REGULATING, FLUID PRESSURE.]. 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 4820008458013 contains an unknown precious metal.
This NSN is associated to Schedule B 8481809050: other taps, cocks, valves, etc., nesoi. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 332911: industrial valve manufacturing.
This information was last updated on Aug 01, 2025.