National Stock Number
4520-01-578-3681
National Stock Number (NSN) 4520-01-578-3681, or NIIN 015783681, (assembly,heater air) was assigned October 2, 2009 in the Federal Logistics Information System (FLIS). NIIN 015783681 was cancelled on April 18, 2020, with a cancelled status of "Item is Cancelled - Inactive." There is no known replacement specified for this stock number. 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, 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) 77777. 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 4520015783681 does not contain precious metals.
This information was last updated on Aug 01, 2025.