The Mask,chemical-Biological, cataloged under National Stock Number 4240-01-452-9077, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Mine Safety Appliances Company. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-452-9077 |
| Primary Part Number | 306764 |
| Item Name | Mask,chemical-Biological |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Mine Safety Appliances Company |
| Status | ACTIVE |
| 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 | CARRYING CASE |
| Facepiece Speaking Diaphragm | INCLUDED |
| Quick Disconnect Coupling Feature | NOT INCLUDED |
| Size Designation | LARGE |
| Canister Carrying Harness | NOT INCLUDED |
| Face Cover Type | FACEPIECE |
| Protection for Which Filter Is Designed | CHEMICAL RESISTANT |
| Material | PLASTIC LENS |
| Material | RUBBER SILICONE CLASS Q LOCATION NOT OTHERWISE SPECIFIED |
| Material | PLASTIC POLYAMIDE NYLON CARRYING CASE |
| Canister Manufacturer Symbol | CB |
| Particulate Filter | INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 306764 PRIMARY | Mine Safety Appliances Company (USA) |
NSN 4240-01-452-9077 is a Mask,chemical-Biological, manufactured by Mine Safety Appliances Company, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-452-9077 has 1 manufacturer part number on file: 306764 (Mine Safety Appliances Company).
Key specifications for 306764: Filter Type: CANISTER; Mounting Position: LEFT CHEEK OR RIGHT CHEEK; Quantity: 2; Microphone: NOT INCLUDED. 18 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 4240-01-452-9077 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.