National Stock Number
4420-01-681-8122
National Stock Number (NSN) 4420-01-681-8122, or NIIN 016818122, (heat exchanger,fluid to air) was assigned July 9, 2019 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. 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 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.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jul 10, 2019, 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 Government physically does not have in its possession sufficient, accurate, or legible data to purchase this part from other than current source(s). (NOTE: This code is applicable only to parts under immediate buy requirements and only as long as the deficiency is under review for resolution and appropriate recoding.) Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 51905. [A HEAT TRANSFER DEVICE DESIGNED TO LOWER THE TEMPERATURE OF A FLUID THROUGH AIRFLOW. MAY BE USED IN AIR CONDITIONING SYSTEMS, DRIVE MECHANISMS, AND THE LIKE. SEE ALSO HEAT EXCHANGER, AIR TO AIR, AIRCRAFT AND HEAT EXCHANGER, AIR TO WATER, AIRCRAFT.]. 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 4420016818122 does not contain precious metals.
This information was last updated on Jul 01, 2025.