National Stock Number
4820-00-540-1870
National Stock Number (NSN) 4820-00-540-1870, or NIIN 005401870, (valve,check) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). NIIN 005401870 was cancelled on September 2, 2003, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 1660009604493. This NSN replaces 1 stock number, 1660005356011.
There are 2 manufacturer part numbers associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, there are no suppliers that are deemed design controlled or valid supply parts.
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 4820005401870 does not contain precious metals.
This information was last updated on Aug 01, 2025.