National Stock Number
4820-00-253-5543
National Stock Number (NSN) 4820-00-253-5543, or NIIN 002535543, (valve,check) was assigned July 25, 1969 in the Federal Logistics Information System (FLIS). NIIN 002535543 was cancelled on December 2, 1998, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 4820007241370. This NSN does not replace any other NSNs.
There are no manufacturer part numbers associated to this NSN.
This part number has not been procured by the US Government in over 5 years.
This NSN is assigned to Item Name Code (INC) 05487. [A VALVE PERMITTING FLOW IN ONE DIRECTION ONLY. IT DOES NOT HAVE A STEM, EXCEPT WHEN EQUIPPED WITH A LEVER AND WEIGHT AND HAS NO PRESSURE ADJUSTMENT. IT MAY BE INLINE OR CARTRIDGE (MANIFOLD) DESIGN.]. This item does not have a critical feature such as tolerance, fit restrictions or application. Nuclear hardness properties have not been determined (not valid for input). There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4820002535543 contains an unknown precious metal.
This information was last updated on Jul 01, 2025.