The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-583-5261, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-583-5261 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| Material Document and Classification | AMS 5596 ASSN STD 1ST MATERIAL RESPONSE AND COMPOUND AEQ935 MFR REF 2ND MATERIAL RESPONSE |
| Aircraft Location | FUSELAGE |
| Material | NICKEL ALLOY 718 AND PLASTIC POLYIMIDE |
| Hole Quantity | 3 |
| Aircraft Mission Design Series | B-1B |
| 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 |
| Reference | Meaning |
|---|---|
| 1807463-143 | 5/9 Secondary reference The Boeing Company Div Legacy Am&m |
| 1807463-143 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-01-583-5261 is a Duct Assembly,air Conditioning-H, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
Key specifications for 1660-01-583-5261: Material Document and Classification: AMS 5596 ASSN STD 1ST MATERIAL RESPONSE AND COMPOUND AEQ935 MFR REF 2ND MATERIAL RESPONSE; Overall Length: 2.500 INCHES NOMINAL IN; Aircraft Location: FUSELAGE; Part Name Assigned by Controlling Agency: SUPPORT BRACKET. 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.
NSN 1660-01-583-5261 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.