National Stock Number
2840-00-065-6664
National Stock Number (NSN) 2840-00-065-6664, or NIIN 000656664, (seal,air,aircraft gas turbine engine) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). NIIN 000656664 was cancelled on May 1, 2004, with a cancelled status of "Item is Cancelled WITHOUT Replacement." There is no known replacement specified for this stock number. This NSN replaces 1 stock number, 2840006299165.
There are 3 manufacturer part numbers associated with this NSN. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 4 suppliers. Today, 4 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 3 suppliers 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) 50595. [A RIGID METALLIC ITEM, GENERALLY CIRCULAR. IT MAY BE FORMED OF SEGMENTED ARCS. IT IS DESIGNED TO PREVENT LEAKAGE OF AIR IN AN ENGINE, GAS TURBINE, AIRCRAFT. IT MAY BE OF VARIOUS CROSS-SECTIONAL SHAPES. IT MAY HAVE MOUNTING FACILITIES. IT MAY ACT AS A SPACER BUT ITS PRIMARY FUNCTION IS AS AN AIR SEAL.]. This item does not have a nuclear hardened feature but does have other critical feature(s) 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 2840000656664 does not contain precious metals.
This information was last updated on Aug 01, 2025.