The Respirator,air Filtering, cataloged under National Stock Number 4240-01-731-5328, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-731-5328 |
| Item Name | Respirator,air Filtering |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| Mask Type | HALF FACEPIECE |
| Head Harness | NOT INCLUDED |
| 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 |
|---|---|
| G055-2000-06 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4240-01-731-5328 is a Respirator,air Filtering, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-01-731-5328: Mask Type: HALF FACEPIECE; Head Harness: NOT INCLUDED; Special Features: TWO PARTICULATE FILTERS INCLUDED, FOUR MASK STRAPS INCLUDED, ONE COMMUNICATIONS CABLE INCLUDED, 150 OHM MICROPHONE INCLUDED; BAYONETS NOT INCLUDED; Part Name Assigned by Controlling Agency: RESPIRATOR. 2 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.