The Hose,air Duct, cataloged under National Stock Number 4720-00-577-7271, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-00-577-7271 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| Measuring Method and Length | 24.000 INCHES NOMINAL OVERALL IN |
| Connection Style | ROUND BOTH ENDS |
| Connection Type | SOFT BOTH ENDS |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.250 INCHES NOMINAL IN |
| Inside Diameter | 0.875 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.438 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.000 INCHES NOMINAL SECOND END IN |
| End Inside Diameter | 0.875 INCHES NOMINAL SECOND END IN |
| End Inside Diameter | 0.875 INCHES NOMINAL FIRST END IN |
| Material | STEEL REINFORCING WIRE |
| Material | RUBBER SILICONE CLASS Q SECOND PLY |
| Material | RUBBER FIRST PLY |
| Material | COTTON AND RUBBER THIRD PLY |
| Material | PLASTIC POLYAMIDE NYLON FOURTH PLY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| C5-19-1893-20 | 3/2 Design control — primary reference U.S. Government activity |
| C5-19-1893 | 5/9 Secondary reference U.S. Government activity |
NSN 4720-00-577-7271 is a Hose,air Duct, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4720-01-506-0544. Verify interchangeability with system specifications before substitution.
Key specifications for 4720-00-577-7271: Measuring Method and Length: 24.000 INCHES NOMINAL OVERALL IN; Connection Style: ROUND BOTH ENDS; Connection Type: SOFT BOTH ENDS; Style Designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED. 16 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.
NSN 4720-00-577-7271 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.