The Mask,chemical-Biological, cataloged under National Stock Number 4240-01-386-4686, 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4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-386-4686 |
| Item Name | Mask,chemical-Biological |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| Filter Type | CANISTER |
| Quantity | 1 |
| Protection for Which Filter Is Designed | BIOLOGICAL ORGANISMS AND CHEMICAL RESISTANT |
| Particulate Filter | INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 5-1-3300-20 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4240-01-386-4686 is a Mask,chemical-Biological, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-01-386-4686: Filter Type: CANISTER; Quantity: 1; Protection for Which Filter Is Designed: BIOLOGICAL ORGANISMS AND CHEMICAL RESISTANT; Special Features: CONSISTS OF ONE MASK,ASSEMBLY,TYPE 1,MED. P/N 5-1-3301-20; ONE BLOWER HARNESS P/N 5-1-3302; ONE MOTOR BLOWER LIGHTWEIGHT P/N 5-1-2789. 4 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4240-01-386-4686 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.