The Hose,air Duct, cataloged under National Stock Number 4720-00-540-0502, 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16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4720-00-540-0502 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| Hose Weight | 2.880 OUNCES PER LINEAR FOOT OZ |
| Measuring Method and Length | 32.000 INCHES NOMINAL OVERALL IN |
| Connection Style | ROUND FIRST END |
| Connection Type | PREFORMED FIRST END |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Cross-Sectional Shape Style | ROUND |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Features Provided | OZONE RESISTANT |
| Inside Diameter | 1.000 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.750 INCHES NOMINAL FIRST END IN |
| Material | FIBERGLASS AND RUBBER CHLOROPRENE CLASS CR SECOND PLY |
| Material | STEEL REINFORCING WIRE |
| Material | FIBERGLASS AND RUBBER CHLOROPRENE CLASS CR FIRST PLY |
| Material | FIBERGLASS AND RUBBER CHLOROPRENE CLASS CR FOURTH PLY |
| Material | RUBBER CHLOROPRENE CLASS CR THIRD PLY |
| Material | FIBERGLASS FIFTH 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 |
|---|---|
| CV15-406617-5 | 5/2 Secondary reference U.S. Government activity |
| 4486-5 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4720-00-540-0502 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): 2990-01-315-1630, 5330-01-332-0002. Verify interchangeability with system specifications before substitution.
Key specifications for 4720-00-540-0502: Hose Weight: 2.880 OUNCES PER LINEAR FOOT OZ; Measuring Method and Length: 32.000 INCHES NOMINAL OVERALL IN; Connection Style: ROUND FIRST END; Connection Type: PREFORMED FIRST END. 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.
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.