The Respirator,air Filtering, cataloged under National Stock Number 4240-01-674-2558, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4240-01-674-2558 |
| Item Name | Respirator,air Filtering |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| Filter Type | FILTER PAD |
| Mask Type | FULL FACEPIECE |
| Adjustability | ADJUSTABLE |
| Protection for Which Cartridge Is Designed | ORGANIC VAPORS-3 |
| 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 |
|---|---|
| 7100214375 | C/1 Advisory reference — outside the item-of-supply concept 3m Company |
| 7100040069 | 3/9 Design control — primary reference 3m Company |
NSN 4240-01-674-2558 is a Respirator,air Filtering, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-01-674-2558: Filter Type: FILTER PAD; Mask Type: FULL FACEPIECE; Adjustability: ADJUSTABLE; Special Features: FLIP-UP ASSEMBLY FOR GRINDING AND PREP WORK;7.9 IN X 4.2 IN (20.3 CM X 10.7 CM);AUDIBLE AND VISUAL ALARMS SIGNAL LOW AIRFLOW AND LOW BATTERY CHARGE CM. 4 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.