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NSN 4730-01-371-5704Government record, cited
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Nut, Tube Coupling4730-01-371-5704

NSN 4730-01-371-5704 · NIIN 013715704
FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings
Government record, cited
Also searched as  4730-01-371-5704 · 4730013715704 · NIIN 013715704 · 01-371-5704 · FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · 17G450074 · 17G450074-71
Nearby stock numbers  ·
L 1.234 INCHES NOMINAL IN 12 HOSE FITTING
4730-01-371-5704 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
  • Nut,tube Coupling — FSC 4730
  • Length to Shoulder: 1.234 INCHES NOMINAL IN
  • Width Across Flats: 2.125 INCHES NOMINAL IN
  • Thread Series: UNIFIED NATIONAL JOINT (UNJ)
  • Thread Direction: RIGHT-HAND
  • Nominal Thread Size: 1.875 INCHES IN
  • Nut Height: 1.406 INCHES NOMINAL IN
  • Nut Style: TUBE COUPLING
Identification
  • NSN: 4730-01-371-5704
  • NIIN: 013715704
  • FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
  • FSG: 47 — Pipe, Tubing, Hose, and Fittings
General Description

The Nut,tube Coupling, cataloged under National Stock Number 4730-01-371-5704, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government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
NSN4730-01-371-5704
Item NameNut,tube Coupling
FSC / FSG4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
StatusACTIVE
Length to Shoulder1.234 INCHES NOMINAL IN
Width Across Flats2.125 INCHES NOMINAL IN
Thread SeriesUNIFIED NATIONAL JOINT (UNJ)
Thread DirectionRIGHT-HAND
Nominal Thread Size1.875 INCHES IN
Nut Height1.406 INCHES NOMINAL IN
Nut StyleTUBE COUPLING
Thread Class3B
Thread Quantity Per Inch12
MaterialSTEEL CORROSION RESISTING OVERALL
Fabrication MethodMACHINED
Smallest Inside Diameter1.917 INCHES NOMINAL IN
Nominal Tube Outside Diameter1.500 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeN
⇄ Related Items 9
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4730-01-371-575617G450074-51 POSSIBLE MATCH
ELBOW,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-575717G450074-53 POSSIBLE MATCH
ELBOW,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-575817G450074-55 POSSIBLE MATCH
ELBOW,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-575917G450074-27 POSSIBLE MATCH
COUPLING,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-576217G450074-29 POSSIBLE MATCH
REDUCER,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-727017G450074-57 POSSIBLE MATCH
ELBOW,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-727117G450074-59 POSSIBLE MATCH
ELBOW,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-727217G450074-61 POSSIBLE MATCH
ELBOW,TUBE
Possible match (shared part number)The Boeing Company
4730-01-371-727317G450074-49 POSSIBLE MATCH
ELBOW,TUBE
Possible match (shared part number)The Boeing Company
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
ReferenceMeaning
17G450074 D/9 Drawing number reference only
U.S. Government activity
17G450074-71 3/2 Design control — primary reference
U.S. Government activity
Related Parts
4730-01-371-5756POSSIBLE MATCH
ELBOW,TUBE
17G450074-51
4730-01-371-5757POSSIBLE MATCH
ELBOW,TUBE
17G450074-53
4730-01-371-5758POSSIBLE MATCH
ELBOW,TUBE
17G450074-55
4730-01-371-5759POSSIBLE MATCH
COUPLING,TUBE
17G450074-27
4730-01-371-5762POSSIBLE MATCH
REDUCER,TUBE
17G450074-29
4730-01-371-7270POSSIBLE MATCH
ELBOW,TUBE
17G450074-57
4730-01-371-7271POSSIBLE MATCH
ELBOW,TUBE
17G450074-59
4730-01-371-7272POSSIBLE MATCH
ELBOW,TUBE
17G450074-61
4730-01-371-7273POSSIBLE MATCH
ELBOW,TUBE
17G450074-49

Frequently Asked Questions

What is NSN 4730-01-371-5704?

NSN 4730-01-371-5704 is a Nut,tube Coupling, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.

What NSN replaces 4730-01-371-5704?

9 possible matches (shared part number, not a government interchangeability claim): 4730-01-371-5756, 4730-01-371-5757, 4730-01-371-5758. Verify interchangeability with system specifications before substitution.

What are the specifications of 4730-01-371-5704?

Key specifications for 4730-01-371-5704: Length to Shoulder: 1.234 INCHES NOMINAL IN; Width Across Flats: 2.125 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL JOINT (UNJ); Thread Direction: RIGHT-HAND. 13 specifications are documented in the U.S. Government catalog.

Is NSN 4730-01-371-5704 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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