NSN 1660-01-120-7461, 1660011207461
MANIFOLD,CABIN AIR

Federal Supply Classification: FSC 1660 - Aircraft Air Conditioning, Heating, and Pressurizing Equipment
National Item Identification Number: NIIN 011207461
Codification Country: United States
Item Name Code: INC 77777
Criticality: (X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
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 1660-01-120-7461

National Stock Number (NSN) 1660-01-120-7461, or NIIN 011207461, (manifold,cabin air) was assigned October 22, 1981 in the Federal Logistics Information System (FLIS). This NSN does not replace any other NSNs.

There are 2 manufacturer part numbers associated with this NSN. 2 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 5 suppliers. Today, 4 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 20 contracts issued for this part number, with 26 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: SPE4A725F2393, SPE4A724F010T, SPE4A724F6254, SPE4A724F6254, SPE4A720F4786. The total value of the awarded contracts has been US$ 1,490,992.58.

This NSN is somewhat common among different platforms, belonging to 2 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. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on May 18, 2019, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (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) 77777. 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 1660011207461 does not contain precious metals.

This information was last updated on Aug 01, 2025.

Technical Characteristics

END ITEM IDENTIFICATION: (AGAV) CH-47 CHINOOK HELICOPTER
PART NAME ASSIGNED BY CONTROLLING AGENCY: (CXCY) MANIFOLD CABIN AIR DUCT
OVERALL LENGTH: (ABHP) 26.00 INCHES NOMINAL
SPECIAL FEATURES: (FEAT) 4.25" OUTSIDE DIAMETER (RIGHT END); 6" OUTSIDE DIAMETER (LEFT END); 4.25" OUTSIDE DIAMETER (TOP END); 8" RADIUS (LEFT CURVE); 4" RADIUS (TOP CURVE - 3.4" CLAMPING AREA); 4" RADIUS (RIGHT CURVE - 3.4" CLAMPING AREA)
SPECIAL TEST FEATURES: (SPCL) DUCT TO BE MANUFACTURED AND QUALIFIED PER BOEING-VERTOL DOCUMENT D210-11405-1 DUCT ASSEMBLY - LOW PRESSURE, CLASS II, TYPE 2
SUPPLEMENTARY FEATURES: (SUPP) OUTER SURFACE OF BEAD TO CONFORM TO MS336660 TYPA A; INNER SURFACE MAY BE FLUSH WITH INSIDE DIAMETER OF DUCT; AREAS SHALL HAVE ADEQUATE RIGIDITY TO WITHSTAND NORMAL CLAMPING PRESSURES