The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-059-2944, 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 3 specifications, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-059-2944 |
| Primary Part Number | 123EC51186-1 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Material Document and Classification | WW-T-700/4 FED SPEC SINGLE MATERIAL RESPONSE |
| Material | ALUMINUM ALLOY |
| Aircraft Mission Design Series | E-2C |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 123EC51186-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 123EC51186-5-D | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| 123EC51186-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| 123EC51186-5-D | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 123EC51186-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 1660-01-059-2944 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.
NSN 1660-01-059-2944 has 1 manufacturer part number on file: 123EC51186-1 (Northrop Grumman Systems Corporation).
Key specifications for 123EC51186-1: Material Document and Classification: WW-T-700/4 FED SPEC SINGLE MATERIAL RESPONSE; Special Features: 2.250 IN. OD IN; End Item Identification: E-2C AIRCRAFT; Material: ALUMINUM ALLOY. 3 specifications are 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 1660-01-059-2944 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.