The Hose,air Duct,air Breathing, cataloged under National Stock Number 4240-01-251-5358, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Scott Technologies, Inc.. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4240-01-251-5358 |
| Primary Part Number | 30020-050 |
| Item Name | Hose,air Duct,air Breathing |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Scott Technologies, Inc. |
| Status | ACTIVE |
| FSC Application Data | RESPIRATOR |
| Measuring Method and Length | 600.000 INCHES NOMINAL OVERALL IN |
| Criticality Code Justification | FEAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 30020-050 PRIMARY | Scott Technologies, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 30020-050 | 5/9 Secondary reference Avox Systems Inc Dba Avox Systems Inc |
NSN 4240-01-251-5358 is a Hose,air Duct,air Breathing, manufactured by Scott Technologies, Inc., classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-251-5358 has 1 manufacturer part number on file: 30020-050 (Scott Technologies, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 6910-01-316-0314. Verify interchangeability with system specifications before substitution.
Key specifications for 30020-050: FSC Application Data: RESPIRATOR; Measuring Method and Length: 600.000 INCHES NOMINAL OVERALL IN; Criticality Code Justification: FEAT; Special Features: SOLE SOURCE REQUIRED BY STATUTE 6.302. 3 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.