The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-656-5293, 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 The Boeing Company Div Legacy Am&m. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-656-5293 |
| Primary Part Number | L5346601-022 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| Aircraft Location | ECS |
| Material | ALUMINUM ALLOY 6061 |
| 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 |
|---|---|
| L5346601-022 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
| Reference | Meaning |
|---|---|
| L5346601 | D/9 Drawing number reference only The Boeing Company Div Legacy Am&m |
NSN 1660-01-656-5293 is a Duct Assembly,air Conditioning-H, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-656-5293 has 1 manufacturer part number on file: L5346601-022 (The Boeing Company Div Legacy Am&m).
1 possible match (shared part number, not a government interchangeability claim): 1660-01-656-5294. Verify interchangeability with system specifications before substitution.
Key specifications for L5346601-022: Overall Length: 16.270 INCHES NOMINAL IN; Special Features: BEND IN DUCT; Aircraft Location: ECS; Part Name Assigned by Controlling Agency: ECS (ENVIRONMENTAL CONTROL SYSTEM) DUCT. 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 1660-01-656-5293 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.