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NSN 4720-01-138-7338Government record, cited
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Hose, Air Duct4720-01-138-7338

NSN 4720-01-138-7338 · NIIN 011387338
FSC 4720 — Hose and Flexible Tubing · FSG 47 — Pipe, Tubing, Hose, and Fittings
Government record, cited
Also searched as  4720-01-138-7338 · 4720011387338 · NIIN 011387338 · 01-138-7338 · FSC 4720 Hose and Flexible Tubing · NAS521 · NAS522 · NAS521-48-9
Nearby stock numbers  ·
END VIEW L 2.250 INCHES NOMINAL OVERALL IN Wall: 0.030 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN PIPE CROSS SECTION
4720-01-138-7338 — Hose and Flexible Tubing
Features
  • Hose,air Duct — FSC 4720
  • Measuring Method and Length: 2.250 INCHES NOMINAL OVERALL IN
  • Connection Type: PLAIN FIRST END
  • Style Designator: SLEEVE SECTION
  • Cross-Sectional Shape Style: ROUND
  • Wall Thickness: 0.030 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN
  • Operating Pressure: 20.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
  • Inside Diameter: 6.000 INCHES NOMINAL FIRST END IN
Identification
  • NSN: 4720-01-138-7338
  • NIIN: 011387338
  • FSC: 4720 — Hose and Flexible Tubing
  • FSG: 47 — Pipe, Tubing, Hose, and Fittings
General Description

The Hose,air Duct, cataloged under National Stock Number 4720-01-138-7338, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4720-01-138-7338
Item NameHose,air Duct
FSC / FSG4720 / 47 — Hose and Flexible Tubing
StatusACTIVE
Measuring Method and Length2.250 INCHES NOMINAL OVERALL IN
Connection TypePLAIN FIRST END
Style DesignatorSLEEVE SECTION
Cross-Sectional Shape StyleROUND
Wall Thickness0.030 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN
Operating Pressure20.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Inside Diameter6.000 INCHES NOMINAL FIRST END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 3
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4720-01-167-6583NAS521-28-12 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
4720-01-465-4124NAS521-8-7 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
4720-01-465-4388NAS521-16-26 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
ReferenceMeaning
NAS521 D/9 Drawing number reference only
U.S. Government activity
NAS522 3/1 Design control — primary reference
U.S. Government activity
NAS521-48-9 3/2 Design control — primary reference
U.S. Government activity
Related Parts
4720-01-167-6583POSSIBLE MATCH
HOSE,AIR DUCT
NAS521-28-12
4720-01-465-4124POSSIBLE MATCH
HOSE,AIR DUCT
NAS521-8-7
4720-01-465-4388POSSIBLE MATCH
HOSE,AIR DUCT
NAS521-16-26

Frequently Asked Questions

What is NSN 4720-01-138-7338?

NSN 4720-01-138-7338 is a Hose,air Duct, classified under FSC 4720, Hose and Flexible Tubing. Status: active.

What NSN replaces 4720-01-138-7338?

3 possible matches (shared part number, not a government interchangeability claim): 4720-01-167-6583, 4720-01-465-4124, 4720-01-465-4388. Verify interchangeability with system specifications before substitution.

What are the specifications of 4720-01-138-7338?

Key specifications for 4720-01-138-7338: Measuring Method and Length: 2.250 INCHES NOMINAL OVERALL IN; Connection Type: PLAIN FIRST END; Style Designator: SLEEVE SECTION; Cross-Sectional Shape Style: ROUND. 7 specifications are documented in the U.S. Government catalog.

Is NSN 4720-01-138-7338 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.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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