National Stock Number
4820-01-068-3504
National Stock Number (NSN) 4820-01-068-3504, or NIIN 010683504, (seat,valve) was assigned November 22, 1978 in the Federal Logistics Information System (FLIS). NIIN 010683504 was cancelled on August 2, 2007, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 4820010518366. This NSN replaces 1 stock number, 4820011795462.
There are 9 manufacturer part numbers associated with this NSN. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 3 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 suppliers are deemed design controlled or valid supply parts.
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.]. This item does not have a nuclear hardened feature or any other critical feature 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 4820010683504 does not contain precious metals.
This information was last updated on Jun 01, 2025.