The Hose,air Duct, cataloged under National Stock Number 4720-01-189-3250, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Bae Systems (operations) Limited. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 — Hose and Flexible Tubing (FSG 47) |
| Manufacturers | Bae Systems (operations) Limited (CAGE U9143) |
| Parameter | Value |
|---|---|
| NSN | 4720-01-189-3250 |
| Primary Part Number | 75A837638-2001 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Bae Systems (operations) Limited |
| 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 |
|---|---|
| 75A837638-2001 | Bae Systems (operations) Limited (GBR) |
| Reference | Meaning |
|---|---|
| 75A837638-2001 | 3/9 Design control — primary reference British Aerospace (military Aircraft & Aerostructures) |
| 75A837638 | D/9 Drawing number reference only British Aerospace (military Aircraft & Aerostructures) |
NSN 4720-01-189-3250 is a Hose,air Duct, manufactured by Bae Systems (operations) Limited, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-189-3250 has 1 manufacturer part number on file: 75A837638-2001 (Bae Systems (operations) Limited).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-302-7602. Verify interchangeability with system specifications before substitution.
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.