The Hose,air Duct, cataloged under National Stock Number 4720-01-372-4956, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Harlow Aerostructures, Llc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4720-01-372-4956 |
| Primary Part Number | 75A837638-2009 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Harlow Aerostructures, Llc |
| Status | ACTIVE |
| Measuring Method and Length | 8.500 INCHES NOMINAL OVERALL IN |
| Connection Style | ROUND BOTH ENDS |
| Connection Type | PREFORMED BOTH ENDS |
| Style Designator | BOX SECTION |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.050 INCHES NOMINAL IN |
| Inside Diameter | 1.250 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.000 INCHES NOMINAL BOTH ENDS IN |
| End Inside Diameter | 1.250 INCHES NOMINAL BOTH ENDS IN |
| Material | RUBBER SINGLE PLY |
| 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 |
|---|---|
| 75A837638-2009 PRIMARY | Harlow Aerostructures, Llc (USA) |
| 75A837638-2009 | Bae Systems (operations) Limited (GBR) |
| Reference | Meaning |
|---|---|
| 75A837638-2009 | 5/9 Secondary reference Bae Systems Plc |
| 75A837638-2009 | 5/9 Secondary reference British Aerospace (military Aircraft & Aerostructures) |
NSN 4720-01-372-4956 is a Hose,air Duct, manufactured by Harlow Aerostructures, Llc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-372-4956 has 2 manufacturer part numbers on file: 75A837638-2009 (Harlow Aerostructures, Llc), 75A837638-2009 (Bae Systems (operations) Limited).
Key specifications for 75A837638-2009: Measuring Method and Length: 8.500 INCHES NOMINAL OVERALL IN; Connection Style: ROUND BOTH ENDS; Connection Type: PREFORMED BOTH ENDS; Style Designator: BOX SECTION. 10 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.