The Hood,chemical-Biological Mask, cataloged under National Stock Number 4240-01-331-6153, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-331-6153 |
| Item Name | Hood,chemical-Biological Mask |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| Coating Substance | RUBBER, BUTYL BOTH SIDES |
| Headwear Fastening Method | ADHESIVE |
| Material | PLASTIC MAIN BODY |
| Fiber Material | NYLON MAIN BODY |
| User Designator | MAN AND WOMAN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | N |
| Reference | Meaning |
|---|---|
| 5-1-2423 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4240-01-331-6153 is a Hood,chemical-Biological Mask, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5325-01-357-1794, 4730-01-615-9328. Verify interchangeability with system specifications before substitution.
Key specifications for 4240-01-331-6153: Coating Substance: RUBBER, BUTYL BOTH SIDES; Headwear Fastening Method: ADHESIVE; End Item Identification: MASK,CHEMICAL-BIOLOGICAL M43E1; Material: PLASTIC MAIN BODY. 5 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 4240-01-331-6153 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.