The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-605-8997, 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 The Boeing Company. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment (FSG 16) |
| Manufacturers | Senior Uk Limited Div Senior Aerospace Bwt (CAGE K2962); The Boeing Company (CAGE 77272) |
| Parameter | Value |
|---|---|
| NSN | 1660-01-605-8997 |
| Primary Part Number | 901-325-334-121 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| 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 |
|---|---|
| BWT30957-21 | Senior Uk Limited Div Senior Aerospace Bwt (GBR) |
| 901-325-334-121 PRIMARY | The Boeing Company (USA) |
| 901-325-334-121 77272 | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 901-325-334-121-101 | 5/9 Secondary reference The Boeing Company |
NSN 1660-01-605-8997 is a Duct Assembly,air Conditioning-H, manufactured by The Boeing Company, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-605-8997 has 3 manufacturer part numbers on file: BWT30957-21 (Senior Uk Limited Div Senior Aerospace Bwt), 901-325-334-121 (The Boeing Company), 901-325-334-121 77272 (The Boeing Company).
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.