National Stock Number
4520-00-222-3560
National Stock Number (NSN) 4520-00-222-3560, or NIIN 002223560, (valve,air venting,steam) was assigned January 1, 1961 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. 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) 04906. [AN AUTOMATIC VALVE DESIGNED TO RELIEVE, AUTOMATICALLY, ACCUMULATED AIR IN VARIOUS TYPES OF STEAM HEATING SYSTEMS.]. 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 4520002223560 does not contain precious metals.
This NSN is associated to Schedule B 8481100090: pressure-reducing valves, nesoi. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 332911: industrial valve manufacturing.
This information was last updated on Aug 01, 2025.