4720-00-255-7821

Find complete technical information, availability, and procurement data for: 4720-00-255-7821
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Federal Supply Group

Pipe, Tubing, Hose, and Fittings

Federal Supply Classification

4720 Hose and Flexible Tubing

National Stock Number

4720-00-255-7821

Item Name Code

20311

Assigment Date

03/12/1971 (55 years ago)

3b 1st end thread class, round cross-sectional shape style, right-hand 1st end thread direction, 3b 2nd end thread class, right-hand 2nd end thread direction

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: 0.250 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
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: 7000.0 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: 45.0 degrees 2nd end
Inside Surface Condition: smooth
Measuring Method And Length: 8.500 inches nominal working
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
13000104-0084F	Nonmetallic Hose Assembly
6844334-045084	Nonmetallic Hose Assembly
W900246-4-0084	Nonmetallic Hose Assembly

FAQs

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

What is the FSCG of the NSN 4720-00-255-7821?

The FSCG of the NSN 4720-00-255-7821 is 4720

Does NSN 4720-00-255-7821 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 4720-00-255-7821 contain precious materials?

Precious metal content is unknown

Does NSN 4720-00-255-7821 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 4720-00-255-7821 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Fri, Mar 12, 1971