Measuring Method and Length: 18.000 INCHES NOMINAL OVERALL18.000 INCHES NOMINAL OVERALL IN
Style Designator: FULLY CONVOLUTED
Material Document and Classification: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE BOTH END COUPLINGS
Cross-Sectional Shape Style: ROUNDROUND
Material: COPPER BOTH END COUPLINGS
Identification
NSN: 4720-01-344-3263
NIIN: 013443263
FSC: 4720 — Hose and Flexible Tubing
FSG: 47 — Pipe, Tubing, Hose, and Fittings
General Description
The Hose Assembly,air Breathing, cataloged under National Stock Number 4720-01-344-3263, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4720-01-344-3263
Item Name
Hose Assembly,air Breathing
FSC / FSG
4720 / 47 — Hose and Flexible Tubing
Status
ACTIVE
Measuring Method and Length
18.000 INCHES NOMINAL OVERALL18.000 INCHES NOMINAL OVERALL IN
Style Designator
FULLY CONVOLUTED
Material Document and Classification
QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE BOTH END COUPLINGS
Cross-Sectional Shape Style
ROUNDROUND
Material
COPPER BOTH END COUPLINGS
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
MS22055A18
2/2Government specification standardization
U.S. Government activity
MIL-DTL-81581
4/1Identification reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 4720 — Hose and Flexible Tubing
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4720-00-000-0080
HOSE ASSEMBLY,NONMETALLIC
4720-00-000-0081
4720-00-000-0081 · Item name not on file
4720-00-000-0084
HOSE,PREFORMED
4720-00-000-0724
4720-00-000-0724 · Item name not on file
4720-00-001-0014
HOSE ASSEMBLY,NONMETALLIC
4720-00-001-0015
4720-00-001-0015 · Item name not on file
4720-00-001-0023
HOSE ASSEMBLY,NONMETALLIC
4720-00-001-0025
4720-00-001-0025 · Item name not on file
Frequently Asked Questions
What is NSN 4720-01-344-3263?
NSN 4720-01-344-3263 is a Hose Assembly,air Breathing, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
What are the specifications of 4720-01-344-3263?
Key specifications for 4720-01-344-3263: Measuring Method and Length: 18.000 INCHES NOMINAL OVERALL18.000 INCHES NOMINAL OVERALL IN; Style Designator: FULLY CONVOLUTED; Material Document and Classification: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE BOTH END COUPLINGS; Cross-Sectional Shape Style: ROUNDROUND. 5 specifications are documented in the U.S. Government catalog.
Is NSN 4720-01-344-3263 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.
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.