FSG: 42 — Fire Fighting, Rescue, and Safety Equipment
General Description
The Mask,chemical-Biological, cataloged under National Stock Number 4240-01-258-0063, 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4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4240-01-258-0063
Item Name
Mask,chemical-Biological
FSC / FSG
4240 / 42 — Safety and Rescue Equipment
Status
ACTIVE
Filter Type
CANISTER
Carrying Facility
CARRYING CASE
Quick Disconnect Coupling Feature
NOT INCLUDED
Face Cover Type
FACEPIECE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL F — Mutilate — Cut
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
N
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
5-1-1000-30
3/2Design control — primary reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 4240 — Safety and Rescue Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4240-00-001-1515
4240-00-001-1515 · Item name not on file
4240-00-001-2684
4240-00-001-2684 · Item name not on file
4240-00-006-0022
HOSE,EVACUATION
4240-00-007-4576
4240-00-007-4576 · Item name not on file
4240-00-007-8182
4240-00-007-8182 · Item name not on file
4240-00-007-8183
4240-00-007-8183 · Item name not on file
4240-00-007-8184
4240-00-007-8184 · Item name not on file
4240-00-007-8185
4240-00-007-8185 · Item name not on file
Frequently Asked Questions
What is NSN 4240-01-258-0063?
NSN 4240-01-258-0063 is a Mask,chemical-Biological, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
What are the specifications of 4240-01-258-0063?
Key specifications for 4240-01-258-0063: Filter Type: CANISTER; Carrying Facility: CARRYING CASE; Quick Disconnect Coupling Feature: NOT INCLUDED; Face Cover Type: FACEPIECE. 4 specifications are documented in the U.S. Government catalog.
Is NSN 4240-01-258-0063 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
What is the DEMIL code for NSN 4240-01-258-0063?
NSN 4240-01-258-0063 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.