The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-00-199-3158, 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 3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-199-3158 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| Material Document and Classification | WW-T-700/14 FED SPEC SINGLE MATERIAL RESPONSE |
| Material Thickness | 0.035 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 5052 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 39-25927-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-00-199-3158 is a Duct Assembly,air Conditioning-H, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
Key specifications for 1660-00-199-3158: Material Document and Classification: WW-T-700/14 FED SPEC SINGLE MATERIAL RESPONSE; Overall Length: 1.500 INCHES NOMINAL IN; Material Thickness: 0.035 INCHES NOMINAL IN; Special Features: 4.000 IN. OD; 3.937 IN. ID; ALUMINUM ALLOY,ALCLAD 6061,CONDITION O,QQ-A-250/11 SHEET FOR DUCTING ATTACHED TO TUBE 7.900 IN. LG,4.600 IN. W,0.050 IN. THK,HEAT TREAT DUCT TO T42 PER BAC 5602 CAGE 82918 IN. 3 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 1660-00-199-3158 has DEMIL Code D. 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.