National Stock Number
1660-01-666-9310
National Stock Number (NSN) 1660-01-666-9310, or NIIN 016669310, (valve assembly,environmental con) was assigned September 27, 2017 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 4 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, only one supplier is deemed design controlled or valid supply parts.
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 17 contracts issued for this part number, with 8 awards given. The US Government has only awarded those contracts to one supplier. The last contract numbers awarded were: SPE4A725F3849, SPE4A725F2632, SPE4A725F0059, SPE4A724F1552, SPE4A724F0599. The total value of the awarded contracts has been US$ 10,440,591.18.
This NSN is unique to one weapons system.
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$ 2,170,995. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Jun 06, 2020, this NSN's acquisition method was noted as: Suitable for competitive acquisition for the first time. (Potential sources shall include dealers/distributors.) Acquisition of this part is restricted to source(s) specified on "Source Control", "Altered Item" or "Selected Item" drawings/documents. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 41911. [AN ASSEMBLY OF TWO OR MORE VALVES ON A COMMON MOUNTING PERFORMING SEPARATE FUNCTIONS. IT IS USED ON THE AIRCRAFT TO CONTROL THE ENVIRONMENTAL SYSTEM.]. 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 1660016669310 does not contain precious metals.
This information was last updated on Aug 01, 2025.