FSG: 42 — Fire Fighting, Rescue, and Safety Equipment
General Description
The Mask,oxygen, cataloged under National Stock Number 4240-01-218-6155, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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
4240-01-218-6155
Item Name
Mask,oxygen
FSC / FSG
4240 / 42 — Safety and Rescue Equipment
Status
ACTIVE
Harness
INCLUDED
Design Type
MOUTH AND NOSE
Mask Size Designation
ADJUSTABLE
Microphone
NOT INCLUDED
Microphone Pocket
NOT INCLUDED
Intake Tube Corrugated Feature
NOT INCLUDED
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Criticality Code
X
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
3525393-1
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 4240-01-218-6155?
NSN 4240-01-218-6155 is a Mask,oxygen, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
What are the specifications of 4240-01-218-6155?
Key specifications for 4240-01-218-6155: Harness: INCLUDED; Design Type: MOUTH AND NOSE; Mask Size Designation: ADJUSTABLE; Microphone: NOT INCLUDED. 6 specifications are documented in the U.S. Government catalog.
Is NSN 4240-01-218-6155 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
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.