4720-00-189-5305

Find complete technical information, availability, and procurement data for: 4720-00-189-5305
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Federal Supply Group

Pipe, Tubing, Hose, and Fittings

Federal Supply Classification

4720 Hose and Flexible Tubing

National Stock Number

4720-00-189-5305

Item Name Code

20311

Assigment Date

02/24/1971 (55 years ago)

A metal item designed for the purpose of securing an engine or compressor valve and positioning the valve spring or valve spring retainer. Excludes:cotter pins, straight pins, keys and washers.

right-hand 1st end thread direction, 2b and 2a 2nd end thread class, right-hand 2nd end thread direction, 2a 1st end thread class, round cross-sectional shape style

Product Characteristics

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

Cross-Sectional Shape Style: round
Thread Class: 2a 1st end
Thread Class: 2b and 2a 2nd end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Inside Diameter: 0.125 inches nominal
Exterior Color: black
Connection Style: inverted flare 1st end
Connection Style: inverted flare 2nd end
End Connection Design: straight 1st end
End Connection Design: straight 2nd end
Connection Type: internally and externally threaded tube 2nd end
Connection Type: threaded external tube 1st end
Burst Test Pressure: 5000.0 pounds per square inch
Layer Composition And Location: 2nd layer braided fabric and outer layer molded rubber, chloroprene and 1st layer braided fabric
Maximum Operating Pressure: 1500.0 pounds per square inch
Nominal Thread Size: 0.375 inches and 0.625 inches 2nd end
Nominal Thread Size: 0.438 inches 1st end
Seat Angle: 37.0 degrees 1st end
Seat Angle: 37.0 degrees 2nd end
Outer Covering Environmental Protection: corrosion resistant and mildew resistant and oil resistant
Inside Surface Condition: smooth
Measuring Method And Length: 22.250 inches nominal overall
Media For Which Designed: fuel/oil, hydrocarbon single response
Thread Series Designator: unf 1st end
Thread Series Designator: unf 2nd end

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
2954644	Nonmetallic Hose Assembly

FAQs

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

What is the FSCG of the NSN 4720-00-189-5305?

The FSCG of the NSN 4720-00-189-5305 is 4720

Does NSN 4720-00-189-5305 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 4720-00-189-5305 contain precious materials?

Precious metal content is unknown

Does NSN 4720-00-189-5305 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 4720-00-189-5305 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Wed, Feb 24, 1971