The Filter,air,chemical-Biological, cataloged under National Stock Number 4240-01-247-2259, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4240-01-247-2259 |
| Item Name | Filter,air,chemical-Biological |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| Material Form | FOAM FILTER |
| 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 |
|---|---|
| 5028666 | 3/9 Design control — primary reference Us Army Combat Surveillance and Target Acquisition Laboratory |
NSN 4240-01-247-2259 is a Filter,air,chemical-Biological, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-01-247-2259: Material Form: FOAM FILTER; Overall Length: 11.812 INCHES NOMINAL IN; Overall Width: 11.812 INCHES NOMINAL IN; Special Features: THICKNESS 1.000 IN. PORM 0.020 IN.; 10 PORES PER INCH IN. 1 specification is 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.