National Stock Number
4820-01-424-5420
National Stock Number (NSN) 4820-01-424-5420, or NIIN 014245420, (valve,vacuum breaking) was assigned January 30, 1996 in the Federal Logistics Information System (FLIS). NIIN 014245420 was cancelled on September 2, 1999, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 4820000901445. 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) 08101. [AN ITEM DESIGNED TO AUTOMATICALLY RELIEVE VACUUM, BY THE INTAKE OF AIR, WHEN THE INTERNAL PRESSURE FALLS BELOW ATMOSPHERIC PRESSURE. SEE ALSO VALVE, VACUUM REGULATING.]. 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 4820014245420 does not contain precious metals.
This information was last updated on Jul 01, 2025.