National Stock Number
2840-00-256-3934
National Stock Number (NSN) 2840-00-256-3934, or NIIN 002563934, (seal,metallic,special) has an unknown assigned date. NIIN 002563934 was cancelled on September 21, 1997, 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 no manufacturer part numbers associated to 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) 40939. [INC 40939 CANCELLED/REPLACED BY ,INC 50480, FIIG A23900, APP-KEY A ,INC 50598, FIIG A10700, APP-KEY H ,INC 50597, FIIG A10700, APP-KEY H , ON 041394 A SINGLE OR MULTI-PIECE ITEM OF METALLIC CONSTRUCTION, SPECIFICALLY DESIGNED TO FORM EITHER A TIGHT AIR OR OIL SEAL AROUND A SHAFT WITHIN A DRIVE MECHANISM. EXCLUDES:SEAL RING, LABYRINTH; SEAL RING ASSEMBLY, LABYRINTH; AND SEAL RING, METAL.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 2840002563934 contains an unknown precious metal.
This information was last updated on Jul 01, 2025.