National Stock Number (NSN) 4820-00-555-7866, or NIIN 005557866, (valve,check) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 3 stock numbers: 1650005293219, 1650005403426, 1650000952070.
There are 7 manufacturer part numbers associated with this NSN. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 11 suppliers. Today, 9 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 7 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 5 years, with the most recent procurement date of Jan 13, 2020. There have been 10 contracts issued for this part number, with 10 awards given. There is moderate competition for this NSN. The US Government has awarded contracts to 8 different suppliers. The last contract numbers awarded were: SPE7M320V1742, SPE7MC19P0790, SPM7M512V6073, SPM7M512V6073, SPM7M212MV229. The total value of the awarded contracts has been US$ 171,670.50.
This NSN is somewhat common among different platforms, belonging to 4 different weapons systems.
There has been a small amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries. The 24 month forecast from the US Government for this part number has high volatility, with an estimated forecasted value of US$ 44,562. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Sep 02, 2004, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The rights to use the data needed to purchase this part from additional sources are not owned by the Government and cannot be purchased. 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 4820005557866 does not contain precious metals.
This NSN is associated to Schedule B 8481301090: check valves of copper having a pressure rating of 850 kpa or over. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 332911: industrial valve manufacturing.
This information was last updated on Aug 01, 2025.