National Stock Number (NSN) 4730-00-288-9391, or NIIN 002889391, (inverted nut,tube coupling) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 4 stock numbers: 4730007295744, 5310003839240, 4730008432638, 4730002894757.
There are 10 manufacturer part numbers associated with this NSN. 8 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 6 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts. ISO Group has several sources of supply for this NSN.
This part number is actively being procured by the US Government, with procurement history within the last 90 days. There have been 10 contracts issued for this part number, with 11 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 5 different suppliers. The last contract numbers awarded were: SPE7LX25FAWLJ, SPE7LX24FAME0, SPM7LX15D0001, SPM7LX15D0001, SPM7LX13D9010. The total value of the awarded contracts has been US$ 726.30.
This NSN is fairly common among different weapons systems, belonging to 14 different platforms.
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 Jun 18, 2016, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. 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) 03857. [AN EXTERNALLY THREADED FASTENING DEVICE WHICH HAS AN INTERNAL OR EXTERNAL SEAT, DESIGNED TO MATE WITH THE SEAT OF AN INTERNALLY THREADED TUBE FITTING FOR THE PURPOSE OF SECURING THE TUBE TO THE FITTING TO FORM A LEAKPROOF CONNECTION.]. This item does not have a nuclear hardened feature but does have other critical feature(s) 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 4730002889391 contains an unknown precious metal.
This NSN is associated to Schedule B 7412200000: copper alloy tube or pipe fittings. The Schedule B End Use is listed as finished metal shapes. NAICS classification category 332919: other metal valve and pipe fitting manufacturing.
This information was last updated on Jul 01, 2025.