The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-249-3867, 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 Aero Components, Llc. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-249-3867 |
| Primary Part Number | 1128EC41109-1 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Aero Components, Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541 FED SPEC SINGLE TREATMENT RESPONSE |
| Material Document and Classification | WW-T-700/4 FED SPEC SINGLE MATERIAL RESPONSE |
| Material Thickness | 0.035 INCHES NOMINAL IN |
| Surface Treatment | CHROMATE |
| Material | ALUMINUM ALLOY 5052 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1128EC41109-1 PRIMARY | Aero Components, Llc (USA) |
| Reference | Meaning |
|---|---|
| 1128EC41109-1 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| 1128EC41109-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 1660-01-249-3867 is a Duct Assembly,air Conditioning-H, manufactured by Aero Components, Llc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-249-3867 has 1 manufacturer part number on file: 1128EC41109-1 (Aero Components, Llc).
Key specifications for 1128EC41109-1: Surface Treatment Document and Classification: MIL-C-5541 FED SPEC SINGLE TREATMENT RESPONSE; Material Document and Classification: WW-T-700/4 FED SPEC SINGLE MATERIAL RESPONSE; Material Thickness: 0.035 INCHES NOMINAL IN; Special Features: CONSIST OF ONE DUCT, INSULATION AND TAPE. 5 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.
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.