The Hose,air Breathing, cataloged under National Stock Number 4720-01-134-3603, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4720-01-134-3603 |
| Primary Part Number | 266AS100-4 |
| Item Name | Hose,air Breathing |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Measuring Method and Length | 72.000 INCHES NOMINAL OVERALL IN |
| Connection Type | FLANGE FIRST END |
| Style Designator | HELICALLY WOUND CONTINOUS WIRE SUPPORTED |
| Cross-Sectional Shape Style | ROUNDROUND |
| Wall Thickness | 0.109 INCHES NOMINAL0.109 INCHES NOMINAL IN |
| Features Provided | OZONE RESISTANT |
| Inside Diameter | 1.000 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 |
| Part Number | Manufacturer |
|---|---|
| 266AS100-4 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| P5008 | D/9 Drawing number reference only U.S. Government activity |
| P5008-4-72 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4720-01-134-3603 is a Hose,air Breathing, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-134-3603 has 1 manufacturer part number on file: 266AS100-4 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-717-6639. Verify interchangeability with system specifications before substitution.
Key specifications for 266AS100-4: Measuring Method and Length: 72.000 INCHES NOMINAL OVERALL IN; Connection Type: FLANGE FIRST END; Style Designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED; Cross-Sectional Shape Style: ROUNDROUND. 7 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.