The Respirator,air Filtering, cataloged under National Stock Number 4240-01-197-7666, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-197-7666 |
| Item Name | Respirator,air Filtering |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| Mask Filter Quantity | 2 |
| Filter Type | CARTRIDGE |
| Mask Type | HALF FACEPIECE |
| Material Type | ELASTIC |
| Adjustability | ADJUSTABLE |
| Exhaust Valve | INCLUDED |
| Head Harness | INCLUDED |
| Strap Type | DOUBLE |
| Filter Replaceability | REPLACEABLE |
| Material | RUBBER MASK |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 7300 MEDIUM | 5/9 Secondary reference 3m Company |
| 7300 MEDIUM | 3/9 Design control — primary reference 3m Company Div Oh&esd |
NSN 4240-01-197-7666 is a Respirator,air Filtering, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-01-197-7666: Mask Filter Quantity: 2; Filter Type: CARTRIDGE; Mask Type: HALF FACEPIECE; Material Type: ELASTIC. 10 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.