The Mask,chemical-Biological, cataloged under National Stock Number 4240-01-683-1392, 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 Cefa. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-683-1392 |
| Primary Part Number | D520111004000 |
| Item Name | Mask,chemical-Biological |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Cefa |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| D520111004000 | Cefa (FRA) |
| Reference | Meaning |
|---|---|
| PU001B | 3/2 Design control — primary reference U.S. Government activity |
NSN 4240-01-683-1392 is a Mask,chemical-Biological, manufactured by Cefa, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-683-1392 has 1 manufacturer part number on file: D520111004000 (Cefa).
Key specifications for D520111004000: Special Features: LENGTH 12.125 INCH;WIDTH 7.25 INCH; HEIGHT 5.5 INCH;WEIGHT 2.5 POUNDS;SMINEX;THESE LOW MAINTENANCE, REUSABLE MASKS WEIGH LESS THAN 0.5 POUND AND ARE MADE TO FIT ANY HEAD SIZE; FILTRATION IS SUPPLIED BY A CHEMICALLY TREATED FILTER THAT HAS BEEN NIOSH MSHA APPROVED FOR ORGANIC VAPORS, CHLORINE, HYDROGEN CHLORIDE, CHLORINE DIOXIDE AND SULFUR DIOXIDE LBS; Part Name Assigned by Controlling Agency: ANTI-PUTREFACTION SINGLE MASK KIT. 0 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.
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.