National Stock Number
2990-01-178-5531
National Stock Number (NSN) 2990-01-178-5531, or NIIN 011785531, (flange,exhaust pipe) was assigned May 7, 1984 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, 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 39 contracts issued for this part number, with 38 awards given. There is moderate competition for this NSN. The US Government has awarded contracts to 9 different suppliers. The last contract numbers awarded were: SPE7L225F0888, SPE7L225F0888, SPE7L225F0361, SPE7L224F1264, SPE7L524V0612. The total value of the awarded contracts has been US$ 532,655.55.
This NSN is somewhat common among different platforms, belonging to 7 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. The 24 month forecast from the US Government for this part number has high volatility, with an estimated forecasted value of US$ 61,082. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Dec 05, 2013, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The data or the rights to use the data needed to purchase this part from additional sources are not owned by the Government and it has been determined that it is uneconomical to purchase them. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 32807. [AN ITEM WITH A THREADED OR UNTHREADED HOLE SPECIFICALLY DESIGNED FOR USE WITH AN EXHAUST PIPE, EXHAUST PIPE CONNECTOR, COMPANION FLANGE OR THE LIKE IN AN ENGINE OR HEATER EXHAUST SYSTEM. THE FACE OF THE FLANGE IS NORMALLY DRILLED FOR CONNECTING BOLTS AND/OR STUDS.]. 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 2990011785531 does not contain precious metals.
This NSN is associated to Schedule B 8708925000: mufflers and exhaust pipes for vehicles, nesoi. The Schedule B End Use is listed as other parts and accessories of vehicles.
This information was last updated on Aug 01, 2025.