PartsTable TECHNICAL DATA SHEET

NSN 4730-01-371-5702Government record, cited

Nut, Tube Coupling4730-01-371-5702

NSN 4730-01-371-5702 · NIIN 013715702

FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings

Government record, cited

Also searched as 4730-01-371-5702 · 4730013715702 · NIIN 013715702 · 01-371-5702 · FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · 17G450074 · 17G450074-65

Nearby stock numbers ← 4730-01-371-5701 Nut, Tube Coupling · 4730-01-371-5703 Nut, Tube Coupling →

4730-01-371-5702 — Hose, Pipe, Tube, Lubrication, and Railing Fittings

Features

Nut,tube Coupling — FSC 4730
Length to Shoulder: 0.656 INCHES NOMINAL IN
Width Across Flats: 0.750 INCHES NOMINAL IN
Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF)
Thread Direction: RIGHT-HAND
Nominal Thread Size: 0.562 INCHES IN
Nut Height: 0.718 INCHES NOMINAL IN
Nut Style: TUBE COUPLING

Identification

NSN: 4730-01-371-5702
NIIN: 013715702
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 4730-01-371-5702, 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13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 11 items share a part number with this NSN in the catalog (possible match — not a government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

Parameter	Value
NSN	4730-01-371-5702
Item Name	Nut,tube Coupling
FSC / FSG	4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Status	ACTIVE
Length to Shoulder	0.656 INCHES NOMINAL IN
Width Across Flats	0.750 INCHES NOMINAL IN
Thread Series	UNIFIED NATIONAL JOINT FINE (UNJF)
Thread Direction	RIGHT-HAND
Nominal Thread Size	0.562 INCHES IN
Nut Height	0.718 INCHES NOMINAL IN
Nut Style	TUBE COUPLING
Thread Class	3B
Thread Quantity Per Inch	18
Material	STEEL CORROSION RESISTING OVERALL
Fabrication Method	MACHINED
Smallest Inside Diameter	0.588 INCHES NOMINAL IN
Nominal Tube Outside Diameter	0.375 INCHES IN

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	N

⇄ Related Items 11

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

4730-01-371-570317G450074-69 POSSIBLE MATCH

NUT,TUBE COUPLING

Possible match (shared part number)The Boeing Company

4730-01-371-570417G450074-71 POSSIBLE MATCH

NUT,TUBE COUPLING

Possible match (shared part number)The Boeing Company

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

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
17G450074	D/9 Drawing number reference only U.S. Government activity
17G450074-65	3/2 Design control — primary reference U.S. Government activity

Related Parts

4730-01-371-5703POSSIBLE MATCH

NUT,TUBE COUPLING

17G450074-69

4730-01-371-5704POSSIBLE MATCH

NUT,TUBE COUPLING

17G450074-71

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 4730-01-371-5702?

NSN 4730-01-371-5702 is a Nut,tube Coupling, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.

What NSN replaces 4730-01-371-5702?

11 possible matches (shared part number, not a government interchangeability claim): 4730-01-371-5703, 4730-01-371-5704, 4730-01-371-5756. Verify interchangeability with system specifications before substitution.

What are the specifications of 4730-01-371-5702?

Key specifications for 4730-01-371-5702: Length to Shoulder: 0.656 INCHES NOMINAL IN; Width Across Flats: 0.750 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Thread Direction: RIGHT-HAND. 13 specifications are documented in the U.S. Government catalog.

Is NSN 4730-01-371-5702 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.

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