The Hose,air Duct, cataloged under National Stock Number 4720-01-240-9656, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-240-9656 |
| Primary Part Number | 1405040 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Measuring Method and Length | 28.000 INCHES NOMINAL OVERALL IN |
| Minimum Inside Bending Radius | 3.200 INCHES IN |
| Connection Type | PLAIN FIRST END |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.125 INCHES NOMINAL IN |
| Inside Diameter | 3.500 INCHES NOMINAL FIRST END IN |
| 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 |
|---|---|
| 1405040 | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 1405040 | 7/9 Vendor item drawing reference Oshkosh Corp |
| CWC3.50X28INLG | 3/2 Design control — primary reference U.S. Government activity |
| FLEXAUSTCWC3.50X28.00 | 5/2 Secondary reference U.S. Government activity |
NSN 4720-01-240-9656 is a Hose,air Duct, manufactured by Oshkosh Defense Llc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-240-9656 has 1 manufacturer part number on file: 1405040 (Oshkosh Defense Llc).
Key specifications for 1405040: Measuring Method and Length: 28.000 INCHES NOMINAL OVERALL IN; Minimum Inside Bending Radius: 3.200 INCHES IN; Connection Type: PLAIN FIRST END; Style Designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED. 7 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.