NSN 1660-01-121-3640 · NIIN 011213640 · Part number C31E2036-5
Northrop Grumman Systems Corporation · FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories · CAGE 26512
Government record, cited
NSN 1660-01-121-3640 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-121-3640. Manufacturer of record part number: C31E2036-5.
Also searched as1660-01-121-3640 ·
1660011213640 ·
NIIN 011213640 ·
01-121-3640 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · CAGE 26512 · C31E2036-5
Nearby stock numbers← 1660-01-121-3606 Nose Cup Assembly, Smoke Mask
·
1660-01-121-3641 Duct Assembly, Air Conditioning-H →
Features
Duct Assembly,air Conditioning-H — FSC 1660
Aircraft Mission Design Series: F-111
1 manufacturer part number on file
Manufacturer of record: Northrop Grumman Systems Corporation
Identification
NSN: 1660-01-121-3640
NIIN: 011213640
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
Primary part number: C31E2036-5
Manufacturer: Northrop Grumman Systems Corporation
General Description
The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-121-3640, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
1660-01-121-3640
Primary Part Number
C31E2036-5
Item Name
Duct Assembly,air Conditioning-H
FSC / FSG
1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Other items in FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1660-00-006-4472
FLANGE,VALVE BODY
1660-00-009-5646
ADAPTER ASSEMBLY,BELLOWS
1660-00-019-8389
1660-00-019-8389 · Item name not on file
1660-00-019-8399
1660-00-019-8399 · Item name not on file
1660-00-031-5285
1660-00-031-5285 · Item name not on file
1660-00-302-4390
PISTON,REGULATING V
1660-00-441-0575
PISTON
1660-01-601-0729
ETHERNET SWITCH
Frequently Asked Questions
What is NSN 1660-01-121-3640?
NSN 1660-01-121-3640 is a Duct Assembly,air Conditioning-H, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What part numbers are listed for NSN 1660-01-121-3640?
NSN 1660-01-121-3640 has 1 manufacturer part number on file: C31E2036-5 (Northrop Grumman Systems Corporation).
What are the specifications of C31E2036-5?
Key specifications for C31E2036-5: Special Features: C/O DUCT ASSY,A/R INSULAT,TAPE; Aircraft Mission Design Series: F-111. 1 specification is documented in the U.S. Government catalog.
Is NSN 1660-01-121-3640 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
What is the DEMIL code for NSN 1660-01-121-3640?
NSN 1660-01-121-3640 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.