The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-040-2948, 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 Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-040-2948 |
| Primary Part Number | 18-54921-11 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| Status | ACTIVE |
| Aircraft Mission Design Series | F-5F |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| NH1002113-11 | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA) |
| 18-54921-11 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| Reference | Meaning |
|---|---|
| 18-54921-11 | 5/9 Secondary reference Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
| NH10022113-11 | 5/9 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| 18-54921-11 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 17019-11 | 5/2 Secondary reference U.S. Government activity |
NSN 1660-01-040-2948 is a Duct Assembly,air Conditioning-H, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-040-2948 has 2 manufacturer part numbers on file: NH1002113-11 (Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution), 18-54921-11 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems).
1 possible match (shared part number, not a government interchangeability claim): 5915-01-200-3385. Verify interchangeability with system specifications before substitution.
Key specifications for 18-54921-11: End Item Identification: F-5F AIRCRAFT; Aircraft Mission Design Series: F-5F. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 1660-01-040-2948 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.