NSN 2990-99-177-7400, 2990991777400
MANIFOLD,AIR EXHAUST,EMISSION

Federal Supply Classification: FSC 2990 - Miscellaneous Engine Accessories, Nonaircraft
National Item Identification Number: NIIN 991777400
Codification Country: United Kingdom
Item Name Code: INC 36218
Hazardous Material Indicator Code: (N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.

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DLMS^® Summary

National Stock Number 2990-99-177-7400

National Stock Number (NSN) 2990-99-177-7400, or NIIN 991777400, (manifold,air exhaust,emission) has an unknown assigned date. This NSN does not replace any other NSNs.

There are no manufacturer part numbers associated to this NSN.

This part number has not been procured by the US Government in over 5 years.

This NSN is assigned to Item Name Code (INC) 36218. [A PREFORMED METALLIC ITEM WITH ONE OR MORE INLET PORTS AND TWO OR MORE OUTLET PORTS. IT IS DESIGNED TO DIRECT AIR PRESSURE INTO THE EXHAUST MANIFOLDS TO REDUCE HYDROCARBONS.].

This information was last updated on Aug 15, 2025.