The Hose,air Duct, cataloged under National Stock Number 4720-01-191-8368, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4720-01-191-8368 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| Measuring Method and Length | 40.000 INCHES NOMINAL OVERALL IN |
| Connection Style | ROUND FIRST END |
| Connection Type | SOFT FIRST END |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Cross-Sectional Shape Style | ROUND |
| Operating Pressure | 15.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Features Provided | OZONE RESISTANT |
| Inside Diameter | 4.000 INCHES NOMINAL FIRST END IN |
| End Overall Length | 2.000 INCHES NOMINAL FIRST END IN |
| End Inside Diameter | 4.060 INCHES NOMINAL FIRST END IN |
| Material | RUBBER SILICONE CLASS Q FIRST PLY |
| Material | RUBBER SILICONE CLASS Q THIRD PLY |
| Material | STEEL CORROSION RESISTING SECOND PLY |
| Material | FIBERGLASS AND RUBBER SILICONE CLASS Q FOURTH PLY |
| 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 |
|---|---|
| 2600604-1 | 3/2 Design control — primary reference U.S. Government activity |
| 2600604 | D/9 Drawing number reference only U.S. Government activity |
NSN 4720-01-191-8368 is a Hose,air Duct, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 4720-01-192-8187, 4720-01-192-8188, 4720-01-192-8189. Verify interchangeability with system specifications before substitution.
Key specifications for 4720-01-191-8368: Measuring Method and Length: 40.000 INCHES NOMINAL OVERALL IN; Connection Style: ROUND FIRST END; Connection Type: SOFT FIRST END; Style Designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED. 14 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.