National Stock Number
4820-01-297-7978
National Stock Number (NSN) 4820-01-297-7978, or NIIN 012977978, (valve,check) was assigned April 7, 1989 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. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 4 suppliers. Today, 3 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 3 suppliers are deemed design controlled or valid supply parts. ISO Group has several sources of supply for this NSN.
This part number has not been procured by the US Government in over a year. There have been 43 contracts issued for this part number, with 43 awards given. There is moderate competition for this NSN. The US Government has awarded contracts to 9 different suppliers. The last contract numbers awarded were: SPE7MC24P0910, SPE7MC24P0910, SPE7M522P2544, SPE7M121F142C, SPE7M121F9029. The total value of the awarded contracts has been US$ 1,057,074.11.
This NSN is very common among different weapons systems, belonging to 25 different platforms.
There has been a moderate amount of 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 24, 2010, 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 data needed to produce this item from additional sources is not physically available. Valid AMCs: 3, 4 and 5.
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.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4820012977978 does not contain precious metals.
This information was last updated on Aug 01, 2025.