The Hose,air Duct, cataloged under National Stock Number 4720-01-042-0680, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4720-01-042-0680 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| Cross-Sectional Shape Style | ROUND |
| Operating Pressure | 10.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Material | FIBERGLASS AND RUBBER SILICONE CLASS Q SECOND 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 |
|---|---|
| C995 | 5/9 Secondary reference U.S. Government activity |
| C995-2 | 3/2 Design control — primary reference U.S. Government activity |
| 5298-2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4720-01-042-0680 is a Hose,air Duct, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 6670-01-329-8505, 5310-01-438-2383. Verify interchangeability with system specifications before substitution.
Key specifications for 4720-01-042-0680: Cross-Sectional Shape Style: ROUND; Operating Pressure: 10.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS; Material: FIBERGLASS AND RUBBER SILICONE CLASS Q SECOND PLY. 3 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.