4720-00-521-6221

Find complete technical information, availability, and procurement data for: 4720-00-521-6221
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Federal Supply Group

Pipe, Tubing, Hose, and Fittings

Federal Supply Classification

4720 Hose and Flexible Tubing

National Stock Number

4720-00-521-6221

Item Name Code

20311

Assigment Date

01/01/1963 (63 years ago)

A definite length of one-conductor electrical wire, wire braid, or other conductive material, except cable or cord, one or both ends of which are processed or terminated. The lead may be of any size or shape, insulated or uninsulated. See also lead, test and bus conductor. Excludes:lead, storage battery; lead, ignition, engine, and items having attached switches, lampholders, suppressors, resistors, and the like.

2a 1st end thread class, round cross-sectional shape style, right-hand 1st end thread direction, 0.188 inches nominal inside diameter, 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: 2a 1st 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 250.0 fahrenheit single response
Outside Diameter: 0.437 inches nominal
Connection Style: flare 2nd end
Connection Style: plain 1st end
End Connection Design: straight 1st end
End Connection Design: straight 2nd end
Connection Type: threaded internal pipe 2nd end
Thread Quantity Per Inch: 20 1st end
Burst Test Pressure: 1700.0 pounds per square inch
Layer Composition And Location: outer layer molded rubber, synthetic and 1st layer braided cotton cord
Maximum Operating Pressure: 425.0 pounds per square inch
Nominal Thread Size: 0.125 inches 2nd end
Nominal Thread Size: 0.438 inches 1st end
Seat Angle: 45.0 degrees 1st end
Hydrostatic Test Pressure: 850.0 pounds per square inch
Outer Covering Environmental Protection: fuel resistant and mildew resistant and oil resistant and ozone resistant and cold resistant
Inside Surface Condition: smooth
Measuring Method And Length: 216.000 inches nominal excluding end fittings
Media For Which Designed: fuel/oil, hydrocarbon single response
Thread Series Designator: nptf 2nd end
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
8708308	Nonmetallic Hose Assembly

FAQs

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

What is the FSCG of the NSN 4720-00-521-6221?

The FSCG of the NSN 4720-00-521-6221 is 4720

Does NSN 4720-00-521-6221 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 4720-00-521-6221 contain precious materials?

Precious metal content is unknown

Does NSN 4720-00-521-6221 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 4720-00-521-6221 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963