The Canister,gas Mask, cataloged under National Stock Number 4240-00-218-0779, 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4 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-00-218-0779 |
| Item Name | Canister,gas Mask |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| Attachment Method for Which Designed | DIRECTLY TO FACE PIECE |
| Diameter | 4.500 INCHES NOMINAL IN |
| Shape | CYLINDRICAL |
| Departure From Cited Document | MILC24314C,PARA 2.1.2 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 803-1327146 | 3/2 Design control — primary reference U.S. Government activity |
| MIL-C-24314 | 4/1 Identification reference U.S. Government activity |
NSN 4240-00-218-0779 is a Canister,gas Mask, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4240-00-935-5444. Verify interchangeability with system specifications before substitution.
Key specifications for 4240-00-218-0779: Attachment Method for Which Designed: DIRECTLY TO FACE PIECE; Diameter: 4.500 INCHES NOMINAL IN; Shape: CYLINDRICAL; Departure From Cited Document: MILC24314C,PARA 2.1.2. 4 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4240-00-218-0779 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.