The Mask,chemical-Biological, cataloged under National Stock Number 4240-00-268-9732, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-00-268-9732 |
| Item Name | Mask,chemical-Biological |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| Carrier Position Type | ONE POSITION |
| Filter Type | CANISTER |
| Mounting Position | LEFT CHEEK OR RIGHT CHEEK |
| Quantity | 2 |
| Microphone | NOT INCLUDED |
| Spectacle Usage Provision | NOT PROVIDED |
| Canister to Facepiece Attachment Method | DIRECT |
| Carrying Facility | CARRIER |
| Accessory Components and Quantity | 1 ANTIFOGGING KIT |
| Facepiece Speaking Diaphragm | INCLUDED |
| Quick Disconnect Coupling Feature | NOT INCLUDED |
| Size Designation | MEDIUM |
| Canister Carrying Harness | NOT INCLUDED |
| Face Cover Type | FACEPIECE |
| Protection for Which Filter Is Designed | BIOLOGICAL ORGANISMS AND WAR GASES AND RADIOACTIVE DUSTS |
| Material | PLASTIC LENS |
| Material | RUBBER POLYISOPRENE NATURAL CLASS NR LOCATION NOT OTHERWISE SPECIFIED |
| Material | RUBBER HEAD HARNESS |
| Canister Manufacturer Symbol | ANY ACCEPTABLE |
| Particulate Filter | INCLUDED |
| User Designator | SHIPBOARD PERSONNEL |
| Carrier Wearing Position | LEFT SIDE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| NDMKV | 5/2 Secondary reference U.S. Government activity |
| 803-1327140 | 3/2 Design control — primary reference U.S. Government activity |
| 23M1840 | 5/9 Secondary reference U.S. Government activity |
| S7702-1434405 | 5/2 Secondary reference U.S. Government activity |
| MIL-M-17522 | 4/1 Identification reference U.S. Government activity |
NSN 4240-00-268-9732 is a Mask,chemical-Biological, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-00-268-9732: Carrier Position Type: ONE POSITION; Filter Type: CANISTER; Mounting Position: LEFT CHEEK OR RIGHT CHEEK; Quantity: 2. 22 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.
NSN 4240-00-268-9732 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.