National Stock Number
2815-01-121-1561
National Stock Number (NSN) 2815-01-121-1561, or NIIN 011211561, (insert,engine valve seat) was assigned October 31, 1981 in the Federal Logistics Information System (FLIS). NIIN 011211561 was cancelled on September 20, 2002, with a cancelled status of "Item is Cancelled - Inactive." There is no known replacement specified for this stock number. This NSN does not replace any other NSNs.
There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. Today, there are no suppliers listed as an Active supplier for this NSN. Of the active suppliers, there are no suppliers that 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) 42140. [A METAL RING DESIGNED TO PROVIDE A SEATING SURFACE FOR A VALVE, POPPET, ENGINE IT IS MADE OF SPECIAL HIGH-GRADE ALLOY METAL THAT CAN WITHSTAND HIGH OPERATING TEMPERATURES. FOR FLUID VALVES, SEE SEAT, VALVE.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 2815011211561 does not contain precious metals.
This information was last updated on Jul 01, 2025.