The Hose,air Duct,air Breathing, cataloged under National Stock Number 4720-00-558-2873, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-00-558-2873 |
| Item Name | Hose,air Duct,air Breathing |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| FSC Application Data | REGULATOR,OXYGEN TO MASK |
| Measuring Method and Length | 72.000 INCHES NOMINAL OVERALL IN |
| Connection Style | ROUND FIRST END |
| Connection Type | PREFORMED FIRST END |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.023 INCHES NOMINAL IN |
| Inside Diameter | 0.750 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.250 INCHES NOMINAL FIRST END IN |
| 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 |
|---|---|
| 232-686-72B | 3/9 Design control — primary reference Avox Systems Inc Dba Avox Systems Inc |
| M87961/1-72 | 3/2 Design control — primary reference U.S. Government activity |
| 8148650 | A/1 Packaging identification reference U.S. Government activity |
| 232-68672 | C/1 Advisory reference — outside the item-of-supply concept Avox Systems Inc Dba Avox Systems Inc |
NSN 4720-00-558-2873 is a Hose,air Duct,air Breathing, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
Key specifications for 4720-00-558-2873: FSC Application Data: REGULATOR,OXYGEN TO MASK; Measuring Method and Length: 72.000 INCHES NOMINAL OVERALL IN; Connection Style: ROUND FIRST END; Connection Type: PREFORMED FIRST END. 8 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.