National Stock Number
4820-01-049-0731
National Stock Number (NSN) 4820-01-049-0731, or NIIN 010490731, (valve,vacuum breaking) has an unknown assigned date. NIIN 010490731 was cancelled on November 2, 1991, with a cancelled status of "Item is Cancelled - Inactive." There is no known replacement specified for this stock number. 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.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4820010490731 contains an unknown precious metal.
This information was last updated on Jul 01, 2025.