National Stock Number
4820-01-228-1581
National Stock Number (NSN) 4820-01-228-1581, or NIIN 012281581, (valve,check) was assigned March 14, 1986 in the Federal Logistics Information System (FLIS). NIIN 012281581 was cancelled on February 2, 2001, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 4820013157599. 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 4820012281581 does not contain precious metals.
This information was last updated on Jul 01, 2025.