The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-332-5302, 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 Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1660-01-332-5302 |
| Primary Part Number | 4A12186-101B |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc |
| Status | ACTIVE |
| Aircraft Station Number | FS1198.31 TO FS1295.31 |
| Material Document and Classification | QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE |
| Aircraft Location | CENTER CARGO COMPARTMENT |
| Material | ALUMINUM ALLOY 6061 |
| Aircraft Mission Design Series | C-5B |
| 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 |
|---|---|
| 4A12186-101B | Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc (USA) |
| 4A12186-101B | Aero Engineering & Manufacturing Company of California, Llc Dba Aeroengineering & Manufacturing Co (USA) |
| 4A12186-101B | Aero Components, Llc (USA) |
| 4A12186-101B | Cpi Aerostructures Inc (USA) |
| Reference | Meaning |
|---|---|
| 4A12186-101A | 5/9 Secondary reference U.S. Government activity |
| 4A12186-101B | 3/2 Design control — primary reference U.S. Government activity |
| 4A12186-101B | 5/2 Secondary reference U.S. Government activity |
| 4A12139-101A | 5/9 Secondary reference U.S. Government activity |
NSN 1660-01-332-5302 is a Duct Assembly,air Conditioning-H, manufactured by Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-332-5302 has 4 manufacturer part numbers on file: 4A12186-101B (Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc), 4A12186-101B (Aero Engineering & Manufacturing Company of California, Llc Dba Aeroengineering & Manufacturing Co), 4A12186-101B (Aero Components, Llc), 4A12186-101B (Cpi Aerostructures Inc).
Key specifications for 4A12186-101B: Aircraft Station Number: FS1198.31 TO FS1295.31; Material Document and Classification: QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE; Aircraft Location: CENTER CARGO COMPARTMENT; Material: ALUMINUM ALLOY 6061. 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.