The Hose,air Breathing, cataloged under National Stock Number 4720-01-341-6220, 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 6 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 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 | 4720-01-341-6220 |
| Primary Part Number | HC36S |
| Item Name | Hose,air Breathing |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Herbert Cooper Co Inc |
| Status | ACTIVE |
| Measuring Method and Length | 36.000 INCHES NOMINAL OVERALL IN |
| Connection Style | ROUND BOTH ENDS |
| Style Designator | FULLY CONVOLUTED W/ WIRE RINGS BETWEEN CONVOLUTIONS |
| Cross-Sectional Shape Style | ROUNDROUND |
| End Inside Diameter | 0.875 INCHES NOMINAL BOTH ENDS IN |
| Material | RUBBER AND RUBBER SYNTHETIC LINER |
| 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 |
|---|---|
| HC36S PRIMARY | Herbert Cooper Co Inc (USA) |
NSN 4720-01-341-6220 is a Hose,air Breathing, manufactured by Herbert Cooper Co Inc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-341-6220 has 1 manufacturer part number on file: HC36S (Herbert Cooper Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-437-7473. Verify interchangeability with system specifications before substitution.
Key specifications for HC36S: Measuring Method and Length: 36.000 INCHES NOMINAL OVERALL IN; Connection Style: ROUND BOTH ENDS; Style Designator: FULLY CONVOLUTED W/ WIRE RINGS BETWEEN CONVOLUTIONS; Cross-Sectional Shape Style: ROUNDROUND. 6 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.