The Hose,air Duct,air Breathing, cataloged under National Stock Number 4240-01-620-1400, 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 3m Company. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-620-1400 |
| Primary Part Number | 7100009685 |
| Item Name | Hose,air Duct,air Breathing |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | 3m Company |
| Status | ACTIVE |
| Connection Style | ROUND BOTH ENDS |
| Style Designator | FULLY CONVOLUTED |
| Cross-Sectional Shape Style | ROUND |
| Coupling Locking Device Quantity | 1 FIRST END |
| Material | RUBBER ALL PLIES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7100009685 PRIMARY | 3m Company (USA) |
| BT-30 | 3m United Kingdom Plc (GBR) |
| A0007902 | Marshall Land Systems Limited (GBR) |
| Reference | Meaning |
|---|---|
| BT-30 | 5/9 Secondary reference 3m Company |
| BT-30 | 3/9 Design control — primary reference 3m Company Div Ss&ps Manufacturing |
NSN 4240-01-620-1400 is a Hose,air Duct,air Breathing, manufactured by 3m Company, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-620-1400 has 3 manufacturer part numbers on file: 7100009685 (3m Company), BT-30 (3m United Kingdom Plc), A0007902 (Marshall Land Systems Limited).
2 possible matches (shared part number, not a government interchangeability claim): 8105-01-675-3603, 7510-01-711-7688. Verify interchangeability with system specifications before substitution.
Key specifications for 7100009685: Connection Style: ROUND BOTH ENDS; Style Designator: FULLY CONVOLUTED; Cross-Sectional Shape Style: ROUND; Coupling Locking Device Quantity: 1 FIRST END. 5 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.