National Stock Number
4820-01-137-8131
National Stock Number (NSN) 4820-01-137-8131, or NIIN 011378131, (seat,valve) has an unknown assigned date. NIIN 011378131 was cancelled on February 2, 1992, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 4820012868454. 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 4820011378131 does not contain precious metals.
This information was last updated on Jul 01, 2025.