4730-00-178-0039

Find complete technical information, availability, and procurement data for: 4730-00-178-0039
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Federal Supply Group

Pipe, Tubing, Hose, and Fittings

Federal Supply Classification

4730 Hose, Pipe, Tube, Lubrication and Railing Fittings

National Stock Number

4730-00-178-0039

Item Name Code

17645

Assigment Date

02/28/1973 (53 years ago)

An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.

0.619 inches minimum and 0.627 inches maximum width across flats, 3b thread class, tube fitting locknut nut style, unjf thread series, right-hand thread direction

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3b
Thread Direction: right-hand
Nut Style: tube fitting locknut
Width Across Flats: 0.619 inches minimum and 0.627 inches maximum
Thread Series: unjf
Packing Recess Diameter: 0.546 inches nominal
Packing Recess Depth: 0.037 inches nominal
Thread Quantity Per Inch: 24
Nominal Thread Size: 1.312 inches
Nominal Tube Outside Diameter: 0.188 inches
Material: aluminum alloy overall
Surface Treatment: anodize overall
Surface Treatment Document And Classification: ams 2470 assn std single treatment response overall

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
J530P03	Tube Fitting Locknut

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 4730-00-178-0039?

The FSCG of the NSN 4730-00-178-0039 is 4730

Does NSN 4730-00-178-0039 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 4730-00-178-0039 contain precious materials?

Precious metal content is unknown

Does NSN 4730-00-178-0039 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 4730-00-178-0039 was assigned to the Federal Catalog?

It was assigned 53 years ago, on Wed, Feb 28, 1973