NSN 4820-99-179-8367, 4820991798367
VALVE,VACUUM BREAKING

Federal Supply Classification: FSC 4820 - Valves, Nonpowered
National Item Identification Number: NIIN 991798367
Codification Country: United Kingdom
Item Name Code: INC 08101
Hazardous Material Indicator Code: (N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.

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DLMS^® Summary

National Stock Number 4820-99-179-8367

National Stock Number (NSN) 4820-99-179-8367, or NIIN 991798367, (valve,vacuum breaking) has an unknown assigned date. This NSN does not replace any other NSNs.

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 3 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) 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 information was last updated on Jan 28, 2026.