National Stock Number (NSN) 4320-01-151-5641, or NIIN 011515641, (pump unit,reciprocating) was assigned April 19, 1983 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN replaces 3 stock numbers: 4320013004172, 4320011912688, 4320011980820.
There are 5 manufacturer part numbers associated with this NSN. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 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 been procured by the US Government within the last year, but shows no recent (last 90 days) procurement activity. There have been 35 contracts issued for this part number, with 32 awards given. There is heavy competition for this NSN. The US Government has awarded contracts to 13 different suppliers. The last contract numbers awarded were: SPE7M125P6224, SPE7M125P1623, SPE7M125P1623, SPE7M123V8811, SPE7M123V6842. The total value of the awarded contracts has been US$ 397,952.72.
This NSN is very common among different weapons systems, belonging to 39 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. The 24 month forecast from the US Government for this part number has high volatility, with an estimated forecasted value of US$ 47,758. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Mar 22, 2020, 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 data needed to produce this item from additional sources is not physically available. Valid AMCs: 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 30475. [AN ASSEMBLED UNIT CONSISTING OF A COMMONLY MOUNTED RECIPROCATING PUMP(S), PRIME MOVER(S), AND THE NECESSARY COMPONENTS TO PROVIDE FOR A COMPLETE OPERATION.]. 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 4320011515641 does not contain precious metals.
This NSN is associated to Schedule B 8413500090: reciprocating positive displacement pumps, nesoi. The Schedule B End Use is listed as industrial engines. NAICS classification category 333911: pump and pumping equipment manufacturing.
This information was last updated on Aug 01, 2025.