National Stock Number
4820-01-256-0642
National Stock Number (NSN) 4820-01-256-0642, or NIIN 012560642, (seat,valve) was assigned May 31, 1987 in the Federal Logistics Information System (FLIS). NIIN 012560642 was cancelled on July 2, 1997, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 4820123308880. 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) 22113. [A REPLACEABLE ITEM DESIGNED TO PROVIDE A STATIONARY SEATING SURFACE FOR A MATING, MOVEABLE ITEM SUCH AS A VALVE DISK OR THE LIKE. THE BODY MAY HAVE A FLANGE OF VARIOUS SHAPES. FOR DIESEL AND GASOLINE RECIPROCATING ENGINES, SEE INSERT, ENGINE VALVE SEAT.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 4820012560642 does not contain precious metals.
This information was last updated on Jun 01, 2025.