National Stock Number
4520-00-273-1233
National Stock Number (NSN) 4520-00-273-1233, or NIIN 002731233, (valve,air venting,hot water radi) was assigned January 1, 1961 in the Federal Logistics Information System (FLIS). 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 unique to one weapons system.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Feb 11, 2020, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. The data needed to produce this item from additional sources is not physically available. Valid AMCs: 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 15682. [A MANUALLY OPERATED DEVICE FOR USE IN A HOT WATER RADIATOR TO RELIEVE ACCUMULATED AIR. IT IS USUALLY CONSTRUCTED WITH A NEEDLE TYPE DISK, AND MAY HAVE A LOOSE KEY HANDLE OR A FIXED WHEEL HANDLE. SEE ALSO VALVE, ANGLE; VALVE, CROSS; AND VALVE, GLOBE.]. 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 4520002731233 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.