The Hose Assembly,air Duct, cataloged under National Stock Number 4720-01-317-7477, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-317-7477 |
| Item Name | Hose Assembly,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| Measuring Method and Length | 18.000 INCHES NOMINAL OVERALL IN |
| Minimum Inside Bending Radius | 1.500 INCHES IN |
| Connection Type | COUPLING FIRST END |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Coupling Style | EXTERNAL COUPLING CLAMP-LOCKING FIRST END |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.081 INCHES NOMINAL IN |
| Operating Pressure | 15.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Features Provided | SCUFF STRIP |
| Inside Diameter | 3.500 INCHES NOMINAL FIRST END IN |
| Material | STEEL CORROSION RESISTING FIRST END COUPLING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 4097 | 5/9 Secondary reference U.S. Government activity |
| CWC 3.5I.D X 18O/A | 3/2 Design control — primary reference U.S. Government activity |
| 2740-412 ASSY 96 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 4456577 | D/9 Drawing number reference only U.S. Government activity |
| 4456577 SHT 23 ASSY 96 | 5/2 Secondary reference U.S. Government activity |
NSN 4720-01-317-7477 is a Hose Assembly,air Duct, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 5120-01-398-9195, 3110-01-407-2802, 5940-01-613-9191. Verify interchangeability with system specifications before substitution.
Key specifications for 4720-01-317-7477: Measuring Method and Length: 18.000 INCHES NOMINAL OVERALL IN; Minimum Inside Bending Radius: 1.500 INCHES IN; Connection Type: COUPLING FIRST END; Style Designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED. 11 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.