National Stock Number
4730-00-021-4971
National Stock Number (NSN) 4730-00-021-4971, or NIIN 000214971, (plug,tube repair,expanding) was assigned January 1, 1961 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 3 manufacturer part numbers associated with this NSN. 3 of those 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, 2 suppliers 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 a year. There have been 8 contracts issued for this part number, with 8 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 3 different suppliers. The last contract numbers awarded were: SPE7M322V0943, SPE7M322V0727, SPE7M315V5056, SPM7MC12VA717, SPM7MC11V7397. The total value of the awarded contracts has been US$ 6,296.54.
This NSN is somewhat common among different platforms, belonging to 2 different weapons systems.
There has been a small amount of demand for this national stock number. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on May 21, 2008, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The annual buy value of this part falls below the screening threshold of $10,000 but it has been screened for known source(s). (NOTE: This code shall not be used when screening parts entering the inventory. It shall not be assigned in preference to or supersede any other AMSC.) Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 22258. [A SLEEVE SHAPED ITEM HAVING A HOLE THROUGH ITS CENTER AND EQUIPPED WITH A MACHINE SCREW, WASHER, AND NUT. DESIGNED TO BE PLACED IN THE END OF A TUBE, SEALING THE TUBE BY TURNING THE SCREW CAUSING THE SLEEVE TO EXPAND AGAINST THE WALLS OF THE TUBE AND IN TURN EXPANDING THE TUBE. FOR TAPERED TUBE REPAIR PLUGS, SEE PLUG, TUBE REPAIR. SEE ALSO CAP-PLUG, RADIATOR TESTING AND PLUG, RADIATOR TEST.]. 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 4730000214971 contains an unknown precious metal.
This information was last updated on Aug 01, 2025.