National Stock Number
4820-01-277-6503
National Stock Number (NSN) 4820-01-277-6503, or NIIN 012776503, (valve,check) was assigned April 25, 1988 in the Federal Logistics Information System (FLIS). NIIN 012776503 was cancelled on July 2, 1999, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 4820011076115. 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 4820012776503 does not contain precious metals.
This information was last updated on Jul 01, 2025.