National Stock Number
4820-00-287-5844
National Stock Number (NSN) 4820-00-287-5844, or NIIN 002875844, (valve,weighted control,piston) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated 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.
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 4820002875844 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.