The Respirator,air Filtering, cataloged under National Stock Number 4240-01-250-0752, 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10 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-250-0752 |
| Item Name | Respirator,air Filtering |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| Mask Filter Quantity | 4 |
| Filter Type | CARTRIDGE AND FILTER PAD |
| Mask Type | HALF FACEPIECE |
| Material Type | NONELASTIC |
| Criticality Code Justification | FEAT |
| Approval Designator | ERR-060 |
| Adjustability | ADJUSTABLE |
| Exhaust Valve | INCLUDED |
| Head Harness | INCLUDED |
| Filter Replaceability | REPLACEABLE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 66LTC | 5/9 Secondary reference Avox Systems Inc Dba Avox Systems Inc |
| 803404-03 | 3/9 Design control — primary reference Scott Technologies, Inc. |
| 642-L | 5/9 Secondary reference Avox Systems Inc Dba Avox Systems Inc |
NSN 4240-01-250-0752 is a Respirator,air Filtering, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-01-250-0752: Mask Filter Quantity: 4; Filter Type: CARTRIDGE AND FILTER PAD; Mask Type: HALF FACEPIECE; Material Type: NONELASTIC. 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.