National Stock Number
4520-21-920-7121
National Stock Number (NSN) 4520-21-920-7121, or NIIN 219207121, (fan burner asembly.) has an unknown assigned date. NIIN 219207121 was cancelled on December 2, 2002, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 4520014983002. This NSN replaces 1 stock number, 4520014540194.
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 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. ISO Group has several sources of supply for this NSN.
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 information was last updated on Jan 09, 2026.