The Hose Assembly,air Breathing, cataloged under National Stock Number 4720-01-227-8527, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Avox Systems Inc Dba Avox Systems Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-227-8527 |
| Primary Part Number | 266-280 |
| Item Name | Hose Assembly,air Breathing |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Avox Systems Inc Dba Avox Systems Inc |
| Status | ACTIVE |
| Hose Weight | 5.000 OUNCES PER LINEAR FOOT OZ |
| Measuring Method and Length | 31.500 INCHES NOMINAL OVERALL IN |
| Connection Style | ROUND FIRST END |
| Connection Type | THREADED FIRST END |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Cross-Sectional Shape Style | ROUNDROUND |
| Wall Thickness | 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN |
| Inside Diameter | 0.750 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.000 INCHES NOMINAL BOTH ENDS IN |
| End Inside Diameter | 0.850 INCHES NOMINAL BOTH ENDS IN |
| Material | RUBBER FIRST PLY |
| Material | STEEL CORROSION RESISTING REINFORCING WIRE |
| Material | COTTON SECOND PLY |
| Material | PLASTIC THIRD PLY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 266-280 PRIMARY | Avox Systems Inc Dba Avox Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 831821-401 | 7/2 Vendor item drawing reference Universal Lockport Corp |
| 831821-401 | 7/9 Vendor item drawing reference U.S. Government activity |
| 8148650 | A/1 Packaging identification reference U.S. Government activity |
NSN 4720-01-227-8527 is a Hose Assembly,air Breathing, manufactured by Avox Systems Inc Dba Avox Systems Inc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-227-8527 has 1 manufacturer part number on file: 266-280 (Avox Systems Inc Dba Avox Systems Inc).
Key specifications for 266-280: Hose Weight: 5.000 OUNCES PER LINEAR FOOT OZ; Measuring Method and Length: 31.500 INCHES NOMINAL OVERALL IN; Connection Style: ROUND FIRST END; Connection Type: THREADED FIRST END. 14 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.