The Hose Assembly,air Breathing, cataloged under National Stock Number 4720-01-350-2771, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Herbert Cooper Co Inc. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-350-2771 |
| Primary Part Number | HC208B24 |
| Item Name | Hose Assembly,air Breathing |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Herbert Cooper Co Inc |
| Status | ACTIVE |
| Hose Weight | 5.000 OUNCES PER LINEAR FOOT OZ |
| Measuring Method and Length | 24.000 INCHES NOMINAL OVERALL IN |
| Minimum Inside Bending Radius | 0.750 INCHES IN |
| Connection Style | ROUND BOTH ENDS |
| Connection Type | THREADED FIRST END |
| Connection Type | THREADED SECOND 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 | 0.875 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.438 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.000 INCHES NOMINAL SECOND END IN |
| End Inside Diameter | 0.875 INCHES NOMINAL BOTH ENDS IN |
| Material | RUBBER FIRST PLY |
| Material | COTTON AND RUBBER THIRD PLY |
| Material | RUBBER SECOND 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 |
| Part Number | Manufacturer |
|---|---|
| HC208B24 PRIMARY | Herbert Cooper Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 51801-20 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 4720-01-350-2771 is a Hose Assembly,air Breathing, manufactured by Herbert Cooper Co Inc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-350-2771 has 1 manufacturer part number on file: HC208B24 (Herbert Cooper Co Inc).
Key specifications for HC208B24: Hose Weight: 5.000 OUNCES PER LINEAR FOOT OZ; Measuring Method and Length: 24.000 INCHES NOMINAL OVERALL IN; Minimum Inside Bending Radius: 0.750 INCHES IN; Connection Style: ROUND BOTH ENDS. 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.
NSN 4720-01-350-2771 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.