Locknut, Tube Fitting4730-01-649-3358

NSN 4730-01-649-3358 · NIIN 016493358

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

Government record, cited

Also searched as 4730-01-649-3358 · 4730016493358 · NIIN 016493358 · 01-649-3358 · FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · MIL-DTL-18866 · MS51888-6 · MS51888-06

Nearby stock numbers ← 4730-01-649-3277 Insert, Tube Fitting · 4730-01-649-3445 Elbow, Hose →

4730-01-649-3358 — Hose, Pipe, Tube, Lubrication, and Railing Fittings

Features

Locknut,tube Fitting — FSC 4730
Width Across Flats: 0.6875 INCHES NOMINAL IN
Thread Series: UNF
Thread Direction: RIGHT-HAND
Nominal Thread Size: 0.5625 INCHES IN
Nut Style: TUBE FITTING LOCKNUT
Thread Class: 2B
Thread Quantity Per Inch: 18

Identification

NSN: 4730-01-649-3358
NIIN: 016493358
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
FSG: 47 — Pipe, Tubing, Hose, and Fittings

General Description

The Locknut,tube Fitting, cataloged under National Stock Number 4730-01-649-3358, 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 9 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4730-01-649-3358
Item Name	Locknut,tube Fitting
FSC / FSG	4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Status	ACTIVE
Width Across Flats	0.6875 INCHES NOMINAL IN
Thread Series	UNF
Thread Direction	RIGHT-HAND
Nominal Thread Size	0.5625 INCHES IN
Nut Style	TUBE FITTING LOCKNUT
Thread Class	2B
Thread Quantity Per Inch	18
Material	STEEL CORROSION RESISTING OVERALL
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	X

Cross-Reference Index

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

Reference documents

Reference	Meaning
MIL-DTL-18866	4/1 Identification reference U.S. Government activity
MS51888-6	5/9 Secondary reference U.S. Government activity
MS51888-06	2/2 Government specification standardization U.S. Government activity

No interchangeability data on file.

Other items in FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

4730-00-000-1895

4730-00-000-1895 · Item name not on file

4730-00-000-4289

4730-00-000-4289 · Item name not on file

4730-00-000-4445

4730-00-000-4445 · Item name not on file

4730-00-000-8373

4730-00-000-8373 · Item name not on file

4730-00-000-8897

4730-00-000-8897 · Item name not on file

4730-00-001-0007

4730-00-001-0007 · Item name not on file

4730-00-001-0008

COUPLING,TUBE

4730-00-001-0008

COUPLING,TUBE

Frequently Asked Questions

What is NSN 4730-01-649-3358?

NSN 4730-01-649-3358 is a Locknut,tube Fitting, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.

What are the specifications of 4730-01-649-3358?

Key specifications for 4730-01-649-3358: Width Across Flats: 0.6875 INCHES NOMINAL IN; Thread Series: UNF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.5625 INCHES IN. 9 specifications are documented in the U.S. Government catalog.

Is NSN 4730-01-649-3358 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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