National Stock Number
2840-00-475-0435
National Stock Number (NSN) 2840-00-475-0435, or NIIN 004750435, (seal,air,aircraft gas turbine en) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 1 stock number, 2840006297552.
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 6 suppliers. Today, 5 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 4 suppliers 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.
There has been very little demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on May 19, 2006, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) This part requires engineering source approval by the design control activity in order to maintain the quality of the part. An alternate source must qualify in accordance with the design control activity's procedures, as approved by the cognizant Government engineering activity. Valid AMCs: 1, 2, 3, 4 and 5.
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.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 2840004750435 does not contain precious metals.
This NSN is associated to Schedule B 8411997050: parts of gas turbine aircraft engines, other than for use in civil aircraft. The Schedule B End Use is listed as engines and turbines for military aircraft. NAICS classification category 336412: aircraft engine and engine parts manufacturing.
This information was last updated on Jul 01, 2025.