National Stock Number
1660-01-677-0522
National Stock Number (NSN) 1660-01-677-0522, or NIIN 016770522, (heat exchanger,air to air,aircraft) was assigned November 27, 2018 in the Federal Logistics Information System (FLIS). NIIN 016770522 was cancelled on April 18, 2019, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 1660015791463. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. 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) 61419. [A HEAT TRANSFER DEVICE DESIGNED TO LOWER COMPRESSED AIR TEMPERATURE TO AN ACCEPTABLE LEVEL BY PASSING IT THROUGH TUBES AND FLOWING DUCTED RAM AIR OVER THE TUBES, HEAT OF THE COMPRESSED AIR IS TRANSFERRED TO THE RAM AIR REDUCING THE TEMPERATURE. CONSISTS OF A SHEET METAL HOUSING WITH RAM AIR CONNECTION(S) WITH OR WITHOUT DUCTS, A TUBULAR TYPE CORE, INLET AND OUTLET PORTS. MAY CONTAIN A SHUTOFF VALVE. NORMALLY USED IN AIRCRAFT AIR CONDITIONING AND/OR AIR INDUCTION 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 1660016770522 does not contain precious metals.
This information was last updated on Aug 01, 2025.