National Stock Number
4820-01-048-5049
National Stock Number (NSN) 4820-01-048-5049, or NIIN 010485049, (seat,valve) was assigned September 26, 1977 in the Federal Logistics Information System (FLIS). NIIN 010485049 was cancelled on August 2, 2016, with a cancelled status of "Item is Cancelled - USE." This NSN was replaced by NSN 4820014752140. 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 very common among different weapons systems, belonging to 43 different platforms.
Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Aug 31, 2020, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) This part requires engineering source approval by the design control activity in order to maintain the quality of the part. An alternate source must qualify in accordance with the design control activity's procedures, as approved by the cognizant Government engineering activity. Valid AMCs: 1, 2, 3, 4 and 5.
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 4820010485049 contains an unknown precious metal.
This information was last updated on Jul 01, 2025.