The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-529-9965, 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5 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1660-01-529-9965 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE AND 595 FED STD 2ND TREATMENT RESPONSE |
| Material Document and Classification | QQ-A-250/11 ASSN STD SINGLE MATERIAL RESPONSE |
| Surface Treatment | ANODIZE |
| Aircraft Location | AIR DUCT |
| Material | ALUMINUM ALLOY 6063 AND ALUMINUM ALLOY 6061 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 171018-1 | 3/2 Design control — primary reference U.S. Government activity |
| 171018 | D/9 Drawing number reference only U.S. Government activity |
NSN 1660-01-529-9965 is a Duct Assembly,air Conditioning-H, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
Key specifications for 1660-01-529-9965: Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE AND 595 FED STD 2ND TREATMENT RESPONSE; Material Document and Classification: QQ-A-250/11 ASSN STD SINGLE MATERIAL RESPONSE; Special Features: MATERIAL FINISHCHEMICAL FILM TREATMENT,COLOR IRREDESCENT YELLOW AND APPLY BLUE POWDER COATING15050; Surface Treatment: ANODIZE. 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.