NSN 4240-01-249-6674 · NIIN 012496674 · Part number 455020
Mine Safety Appliances Company · FSC 4240 — Safety and Rescue Equipment · FSG 42 — Fire Fighting, Rescue, and Safety Equipment · CAGE 55799
Government record, cited
NSN 4240-01-249-6674 — this item is cataloged by the U.S. Government under National Stock Number 4240-01-249-6674. Manufacturer of record part number: 455020.
Also searched as4240-01-249-6674 ·
4240012496674 ·
NIIN 012496674 ·
01-249-6674 ·
FSC 4240 Safety and Rescue Equipment · CAGE 55799 · 455020
Measuring Method and Length: 60.000 INCHES NOMINAL OVERALL IN
Criticality Code Justification: FEAT
1 manufacturer part number on file
Manufacturer of record: Mine Safety Appliances Company
Identification
NSN: 4240-01-249-6674
NIIN: 012496674
FSC: 4240 — Safety and Rescue Equipment
FSG: 42 — Fire Fighting, Rescue, and Safety Equipment
Primary part number: 455020
Manufacturer: Mine Safety Appliances Company
General Description
The Hose,air Duct,air Breathing, cataloged under National Stock Number 4240-01-249-6674, 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 2 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.
Technical Specifications
Parameter
Value
NSN
4240-01-249-6674
Primary Part Number
455020
Item Name
Hose,air Duct,air Breathing
FSC / FSG
4240 / 42 — Safety and Rescue Equipment
Manufacturer
Mine Safety Appliances Company
Status
ACTIVE
Measuring Method and Length
60.000 INCHES NOMINAL OVERALL IN
Criticality Code Justification
FEAT
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
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 4240-01-249-6674?
NSN 4240-01-249-6674 is a Hose,air Duct,air Breathing, manufactured by Mine Safety Appliances Company, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
What part numbers are listed for NSN 4240-01-249-6674?
NSN 4240-01-249-6674 has 1 manufacturer part number on file: 455020 (Mine Safety Appliances Company).
What are the specifications of 455020?
Key specifications for 455020: Measuring Method and Length: 60.000 INCHES NOMINAL OVERALL IN; Criticality Code Justification: FEAT; Special Features: SOLE SOURCE REQUIRED BY STATUTE 6.302; FOR USE WITH NIOSH/MSHA APPROVED SYSTEM. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4240-01-249-6674 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.