National Stock Number
4820-00-423-2957
National Stock Number (NSN) 4820-00-423-2957, or NIIN 004232957, (valve,check) was assigned January 1, 1961 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 2 stock numbers: 6620004231576, 4310000249445.
There are 3 manufacturer part numbers associated with this NSN. 3 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 5 suppliers. Today, 4 suppliers are listed as Active suppliers 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 a year. There have been 3 contracts issued for this part number, with 3 awards given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPE7M123P7667, SPE7M122V4238, SPE7M122V4238, SPE7M121P3390, SPE7M121P3390. The total value of the awarded contracts has been US$ 28,944.64.
This NSN is unique to one weapons system.
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 02, 2005, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. This part requires engineering source approval by the design control activity in order to maintain the quality of the part. An alternate source must qualify in accordance with the design control activity's procedures, as approved by the cognizant Government engineering activity. Valid AMCs: 1, 2, 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.]. 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 4820004232957 contains an unknown precious metal.
This NSN is associated to Schedule B 8481302090: check valves of steel. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 332911: industrial valve manufacturing.
This information was last updated on Jul 01, 2025.