National Stock Number
4520-00-752-4078
National Stock Number (NSN) 4520-00-752-4078, or NIIN 007524078, (reducer,air conditioning-heating) was assigned January 1, 1962 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 1 stock number, 4520005671629.
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 2 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, only one supplier is 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 somewhat common among different platforms, belonging to 6 different weapons systems.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Dec 10, 2013, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The Government has unlimited rights to the technical data, and the data package is complete. Valid AMCs: 1 and 2.
This NSN is assigned to Item Name Code (INC) 33669. [A FITTING DESIGNED TO REDUCE THE SIZE OF AIR CONDITIONING-HEATING FLUE PIPES OR FITTINGS.]. 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 4520007524078 contains an unknown precious metal.
This information was last updated on Jul 01, 2025.