The Exhalation Valve, cataloged under National Stock Number 4240-01-455-2809, 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. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-455-2809 |
| Primary Part Number | 7000002057 |
| Item Name | Exhalation Valve |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | 3m Company |
| Status | ACTIVE |
| 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 |
|---|---|
| 7000002057 PRIMARY | 3m Company (USA) |
| 49688900 | Technisch Bureau Magema B.v. (NLD) |
| Reference | Meaning |
|---|---|
| 6889 | 3/9 Design control — primary reference 3m Company |
| 6889 | 5/9 Secondary reference 3m Company Div Oh&esd |
NSN 4240-01-455-2809 is a Exhalation Valve, manufactured by 3m Company, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-455-2809 has 2 manufacturer part numbers on file: 7000002057 (3m Company), 49688900 (Technisch Bureau Magema B.v.).
Key specifications for 7000002057: Special Features: USED ON 6000 SERIES FULL FACEPIECE RESPIRATOR, NIOSH 42CFR84 APPROVED. 0 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.