National Stock Number
4320-99-831-8656
National Stock Number (NSN) 4320-99-831-8656, or NIIN 998318656, (piston,pump) has an unknown assigned date. This NSN does not replace any other NSNs.
There are 3 manufacturer part numbers 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, one supplier is 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 somewhat common among different platforms, belonging to 2 different weapons systems.
This NSN is assigned to Item Name Code (INC) 60806.
This information was last updated on Oct 17, 2025.