National Stock Number
5120-12-181-5080
National Stock Number (NSN) 5120-12-181-5080, or NIIN 121815080, (expander,piston ring) has an unknown assigned date. This NSN does not replace any other NSNs.
There are 5 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 4 suppliers. Today, 3 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, there are no suppliers that are deemed design controlled or valid supply parts. ISO Group has several sources of supply for 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) 18364. [A PLIER-LIKE HAND TOOL, DESIGNED TO GRIP AND EXPAND PISTON RINGS WHEN INSTALLING OR REMOVING SAME FROM PISTONS.].
This information was last updated on Dec 05, 2025.