National Stock Number
2840-01-283-8900
National Stock Number (NSN) 2840-01-283-8900, or NIIN 012838900, (seal ring,labyrinth,aircraft gas) was assigned August 14, 1988 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.
There is only one manufacturer part number 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, 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 Oct 15, 2020, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. 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) 50599. [AN ITEM OF SINGLE PIECE METAL KNIFE EDGED CONSTRUCTION USED TO FORM A TIGHT AIR SEAL. IT IS MOUNTED ON A ROTATING PORTION OF THE ENGINE. IT MAY BE USED IN CONJUNCTION WITH OTHER SEALS TO PREVENT OIL SEEPAGE.]. 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 2840012838900 does not contain precious metals.
This information was last updated on Jul 01, 2025.