The Respirator,air Filtering, cataloged under National Stock Number 4240-01-496-1938, 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10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4240-01-496-1938 |
| Item Name | Respirator,air Filtering |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| Mask Filter Quantity | 3 |
| Filter Type | CARTRIDGE |
| Mask Type | HOOD |
| Supplementary Features | NO FACE MASK |
| Visual Provision Type | WINDOW |
| Exhaust Valve | NOT INCLUDED |
| Head Harness | NOT INCLUDED |
| Filter Replaceability | REPLACEABLE |
| Material | CELLULOSE ACETATE VISUAL PROVISION |
| Material | RUBBER BUTYL LOCATION NOT OTHERWISE SPECIFIED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 7010341186 | C/1 Advisory reference — outside the item-of-supply concept 3m Company |
| FR-57L10 | 3/9 Design control — primary reference 3m Company Div Oh&esd |
NSN 4240-01-496-1938 is a Respirator,air Filtering, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-01-496-1938: Mask Filter Quantity: 3; Filter Type: CARTRIDGE; Mask Type: HOOD; Supplementary Features: NO FACE MASK. 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.
NSN 4240-01-496-1938 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.