4720-01-156-9858

Find complete technical information, availability, and procurement data for: 4720-01-156-9858
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Federal Supply Group

Pipe, Tubing, Hose, and Fittings

Federal Supply Classification

4720 Hose and Flexible Tubing

National Stock Number

4720-01-156-9858

Item Name Code

20311

Assigment Date

06/28/1983 (43 years ago)

A valve having one outlet and two inlets that are usually opposite each other. It has a fluid pressure operated pistonlike item, called a shuttle, that controls either inlet. It is commonly used to provide an emergency passage for fluid in an aircraft hydraulic or pneumatic system in case of loss of pressure in the normal service lines.

round cross-sectional shape style, right-hand 1st end thread direction, -40.0 fahrenheit and 250.0 fahrenheit single response temp rating, 0.310 inches nominal inside diameter, 3b 1st end thread class

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: 3b 1st end
Thread Direction: right-hand 1st end
Inside Diameter: 0.310 inches nominal
Temp Rating: -40.0 fahrenheit and 250.0 fahrenheit single response
Outside Diameter: 0.680 inches nominal
Minimum Inside Bending Radius: 4.000 inches
Connection Style: swivel nut flare 1st end
End Connection Design: straight 1st end
Connection Type: threaded internal tube 1st end
Burst Test Pressure: 9000.0 pounds per square inch
Layer Composition And Location: 1st layer braided textile yarn and 2nd layer braided corrosion resistant steel wire and outer layer rubber impregnated braided fabric
Maximum Operating Pressure: 2250.0 pounds per square inch
Nominal Thread Size: 0.562 inches 1st end
Seat Angle: 37.0 degrees 1st end
Inside Surface Condition: smooth
Measuring Method And Length: 35.000 inches nominal excluding end fittings
Media For Which Designed: fuel/oil, hydrocarbon single response
Thread Series Designator: unf 1st 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
33S637FF	Nonmetallic Hose Assembly

FAQs

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

What is the FSCG of the NSN 4720-01-156-9858?

The FSCG of the NSN 4720-01-156-9858 is 4720

Does NSN 4720-01-156-9858 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 4720-01-156-9858 contain precious materials?

Item does not contain precious metal.

Does NSN 4720-01-156-9858 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 4720-01-156-9858 was assigned to the Federal Catalog?

It was assigned 43 years ago, on Tue, Jun 28, 1983