The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-506-9049, 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 Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-506-9049 |
| Primary Part Number | IT4948-101 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc |
| Status | ACTIVE |
| 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 |
|---|---|
| IT4948-101 PRIMARY | Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 65209-02118-101 | 7/2 Vendor item drawing reference Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| IT4998-101 | 5/9 Secondary reference Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc |
NSN 1660-01-506-9049 is a Duct Assembly,air Conditioning-H, manufactured by Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-506-9049 has 1 manufacturer part number on file: IT4948-101 (Industrial Tube Co Llc Dba Industrial Tube Co Llc Div Industrial Tube Company, Llc).
Key specifications for IT4948-101: Special Features: NHA COOLING INSTALLATION DOPPLER COMPARTMENT; Part Name Assigned by Controlling Agency: DUCT, FLEXIBLE COCKPIT, CANOPY. 0 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.