4720-01-391-3203

Find complete technical information, availability, and procurement data for: 4720-01-391-3203
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Federal Supply Group

Pipe, Tubing, Hose, and Fittings

Federal Supply Classification

4720 Hose and Flexible Tubing

National Stock Number

4720-01-391-3203

Item Name Code

20311

Assigment Date

06/08/1994 (32 years ago)

A item specifically designed to automatically/manually maintain outlet pressure in a divers helmet/breathing apparatus. It is designed for use with breathing gasses.

3b 1st end thread class, right-hand 2nd end thread direction, round cross-sectional shape style, right-hand 1st end thread direction, 3b 2nd 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 Class: 3b 2nd end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Inside Diameter: 0.188 inches nominal
Temp Rating: -65.0 fahrenheit and 450.0 fahrenheit single response
Outside Diameter: 0.343 inches nominal
Minimum Inside Bending Radius: 2.000 inches
Exterior Color: natural
End Item Identification: 2350-01-087-1095
Connection Style: swivel nut flare 1st end
Connection Style: swivel nut flare 2nd end
End Connection Design: elbow 2nd end
End Connection Design: straight 1st end
Connection Type: threaded internal tube 1st end
Connection Type: threaded internal tube 2nd end
Burst Test Pressure: 12000.0 pounds per square inch
Layer Composition And Location: outer layer braided corrosion resistant steel wire
Maximum Operating Pressure: 1500.0 pounds per square inch
Nominal Thread Size: 0.438 inches 1st end
Nominal Thread Size: 0.438 inches 2nd end
Seat Angle: 37.0 degrees 1st end
Seat Angle: 37.0 degrees 2nd end
Hydrostatic Test Pressure: 3000.0 pounds per square inch
Flow Angle: 90.0 degrees 2nd end
Vacuum In Torr: 28.0
Inside Surface Condition: smooth
Measuring Method And Length: 10.750 inches nominal overall
Thread Series Designator: unjf 2nd end
Thread Series Designator: unjf 1st end

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4720-01-201-4826	No Name Available	08/01/1995

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
4720013913203	Nonmetallic Hose Assembly
AE3660130E106	Nonmetallic Hose Assembly
MS8006E106C	Nonmetallic Hose Assembly

FAQs

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

What is the FSCG of the NSN 4720-01-391-3203?

The FSCG of the NSN 4720-01-391-3203 is 4720

Does the NSN 4720-01-391-3203 have a Schedule B code assigned?

Yes, the Schedule B code is 4009220050

Does NSN 4720-01-391-3203 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 4720-01-391-3203 contain precious materials?

Item does not contain precious metal.

Does NSN 4720-01-391-3203 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 4720-01-391-3203 was assigned to the Federal Catalog?

It was assigned 32 years ago, on Wed, Jun 8, 1994