The Hose Assembly,air Breathing, cataloged under National Stock Number 4720-00-280-0485, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-00-280-0485 |
| Item Name | Hose Assembly,air Breathing |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| FSC Application Data | AIRCRAFT AIR CONDITIONING |
| Measuring Method and Length | 54.000 INCHES NOMINAL OVERALL IN |
| Connection Style | ROUND BOTH ENDS |
| Connection Type | COUPLING SECOND END |
| Connection Type | SOFT FIRST END |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Coupling Style | OXYGEN HOSE CLAMP FIRST END |
| Coupling Style | CONNECTOR, OXYGEN HOSE TO REGULATOR W/ CLIP (NOTE: APPLICABLE TO HOSE ASSEMBLY, AIR BREATHING ONLY.) SECOND END |
| Cross-Sectional Shape Style | ROUNDROUND |
| Wall Thickness | 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN |
| Outside Diameter | 0.938 INCHES MINIMUM AND 1.000 INCHES MAXIMUM BOTH ENDS IN |
| Features Provided | OZONE RESISTANT |
| Inside Diameter | 0.750 INCHES NOMINAL FIRST END IN |
| End Overall Length | 0.938 INCHES MINIMUM AND 1.062 INCHES MAXIMUM BOTH ENDS IN |
| End Inside Diameter | 0.844 INCHES MINIMUM AND 0.875 INCHES MAXIMUM BOTH ENDS IN |
| Material | STEEL REINFORCING WIRE |
| Material | COPPER ALLOY SECOND END COUPLING |
| Material | COTTON AND FIBERGLASS FIRST 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 |
|---|---|
| MIL-DTL-81581 | 4/1 Identification reference U.S. Government activity |
| MS22055A54 | 2/2 Government specification standardization U.S. Government activity |
NSN 4720-00-280-0485 is a Hose Assembly,air Breathing, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
Key specifications for 4720-00-280-0485: FSC Application Data: AIRCRAFT AIR CONDITIONING; Measuring Method and Length: 54.000 INCHES NOMINAL OVERALL IN; Connection Style: ROUND BOTH ENDS; Connection Type: COUPLING SECOND END. 18 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 4720-00-280-0485 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.