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NSN 4720-01-644-5745Government record, cited
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Hose, Air Duct4720-01-644-5745

NSN 4720-01-644-5745 · NIIN 016445745
FSC 4720 — Hose and Flexible Tubing · FSG 47 — Pipe, Tubing, Hose, and Fittings
Government record, cited
Also searched as  4720-01-644-5745 · 4720016445745 · NIIN 016445745 · 01-644-5745 · FSC 4720 Hose and Flexible Tubing · M32107/12-1N4 MIDNT BL · M32107/12-1N4 MIDNT BL · M32107/12-1N4-MIDNT BL · MIL-PRF-32107/12
Nearby stock numbers  ·
END VIEW OD 5.125 INCHES MAXIMUM BOTH ENDS IN PIPE CROSS SECTION
4720-01-644-5745 — Hose and Flexible Tubing
Features
  • Hose,air Duct — FSC 4720
  • Inside Width: 0.750 INCHES MINIMUM AND 1.000 INCHES MAXIMUM BOTH ENDS IN
  • Cross-Sectional Shape Style: ROUND
  • Outside Diameter: 5.125 INCHES MAXIMUM BOTH ENDS IN
  • Inside Diameter: 5.000 INCHES MINIMUM BOTH ENDS IN
  • Outside Width: 1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM BOTH ENDS IN
  • Material: PLASTIC ARAMID ALL PLIES
Identification
  • NSN: 4720-01-644-5745
  • NIIN: 016445745
  • FSC: 4720 — Hose and Flexible Tubing
  • FSG: 47 — Pipe, Tubing, Hose, and Fittings
General Description

The Hose,air Duct, cataloged under National Stock Number 4720-01-644-5745, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 11 items share a part number with this NSN in the catalog (possible match — not a government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
NSN4720-01-644-5745
Item NameHose,air Duct
FSC / FSG4720 / 47 — Hose and Flexible Tubing
StatusACTIVE
Inside Width0.750 INCHES MINIMUM AND 1.000 INCHES MAXIMUM BOTH ENDS IN
Cross-Sectional Shape StyleROUND
Outside Diameter5.125 INCHES MAXIMUM BOTH ENDS IN
Inside Diameter5.000 INCHES MINIMUM BOTH ENDS IN
Outside Width1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM BOTH ENDS IN
MaterialPLASTIC ARAMID ALL PLIES
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 11
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4720-01-644-6566 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)
4720-01-644-7100 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)
4720-01-644-8098 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)
4720-01-644-8140 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)
4720-01-649-9186 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)
4720-01-649-9220 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)
4720-01-649-9223 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)
4720-01-649-9225 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)
4720-01-649-9240 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)
4720-01-649-9251 POSSIBLE MATCH
HOSE,AIR DUCT
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
ReferenceMeaning
M32107/12-1N4 MIDNT BL 5/9 Secondary reference
Ke Fibertec North America Inc
M32107/12-1N4 MIDNT BL 5/9 Secondary reference
U.S. Government activity
M32107/12-1N4-MIDNT BL 2/2 Government specification standardization
U.S. Government activity
MIL-PRF-32107/12 4/1 Identification reference
U.S. Government activity
Related Parts
4720-01-644-6566POSSIBLE MATCH
HOSE,AIR DUCT
4720-01-644-7100POSSIBLE MATCH
HOSE,AIR DUCT
4720-01-644-8098POSSIBLE MATCH
HOSE,AIR DUCT
4720-01-644-8140POSSIBLE MATCH
HOSE,AIR DUCT
4720-01-649-9186POSSIBLE MATCH
HOSE,AIR DUCT
4720-01-649-9220POSSIBLE MATCH
HOSE,AIR DUCT
4720-01-649-9223POSSIBLE MATCH
HOSE,AIR DUCT
4720-01-649-9225POSSIBLE MATCH
HOSE,AIR DUCT
4720-01-649-9240POSSIBLE MATCH
HOSE,AIR DUCT
4720-01-649-9251POSSIBLE MATCH
HOSE,AIR DUCT
4720-01-649-9255POSSIBLE MATCH
HOSE,AIR DUCT

Frequently Asked Questions

What is NSN 4720-01-644-5745?

NSN 4720-01-644-5745 is a Hose,air Duct, classified under FSC 4720, Hose and Flexible Tubing. Status: active.

What NSN replaces 4720-01-644-5745?

11 possible matches (shared part number, not a government interchangeability claim): 4720-01-644-6566, 4720-01-644-7100, 4720-01-644-8098. Verify interchangeability with system specifications before substitution.

What are the specifications of 4720-01-644-5745?

Key specifications for 4720-01-644-5745: Inside Width: 0.750 INCHES MINIMUM AND 1.000 INCHES MAXIMUM BOTH ENDS IN; Cross-Sectional Shape Style: ROUND; Outside Diameter: 5.125 INCHES MAXIMUM BOTH ENDS IN; Inside Diameter: 5.000 INCHES MINIMUM BOTH ENDS IN. 6 specifications are documented in the U.S. Government catalog.

Is NSN 4720-01-644-5745 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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