The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-295-2663, 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 Bemco, Inc. Government technical data includes 2 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1660-01-295-2663 |
| Primary Part Number | 398-10751-501 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Bemco, Inc |
| Status | ACTIVE |
| Aircraft Location | COOLING AIR STUB PYLON MOLDED DUCT |
| Aircraft Mission Design Series | B-52 |
| 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 |
|---|---|
| 398-10751-501 | Bemco, Inc (USA) |
| Reference | Meaning |
|---|---|
| 398-10751-501 | 5/2 Secondary reference U.S. Government activity |
| 398-10751-501 | 3/2 Design control — primary reference U.S. Government activity |
| 398-10751-2 | 5/9 Secondary reference Bemco, Inc |
| 398-10751-2 | 5/9 Secondary reference U.S. Government activity |
NSN 1660-01-295-2663 is a Duct Assembly,air Conditioning-H, manufactured by Bemco, Inc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-295-2663 has 1 manufacturer part number on file: 398-10751-501 (Bemco, Inc).
Key specifications for 398-10751-501: Special Features: SEMI-FLEXIBLE PER BMS B-17, TYPE II, GRADE F, CLASS 2, FORM 4; NHA 398-10673; OPPOSITE -1; FINISH F-7.10; Aircraft Location: COOLING AIR STUB PYLON MOLDED DUCT; End Item Identification: B-52 AIRCRAFT; Aircraft Mission Design Series: B-52. 2 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 1660-01-295-2663 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.