National Stock Number
4820-01-139-1688
National Stock Number (NSN) 4820-01-139-1688, or NIIN 011391688, (seat,valve) has an unknown assigned date. NIIN 011391688 was cancelled on August 10, 1991, with a cancelled status of "Item is Cancelled as Duplicate." This NSN was replaced by NSN 4820011900416. 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 4820011391688 does not contain precious metals.
This information was last updated on Jun 01, 2025.