4720-00-580-7470

Find complete technical information, availability, and procurement data for: 4720-00-580-7470
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Federal Supply Group

Pipe, Tubing, Hose, and Fittings

Federal Supply Classification

4720 Hose and Flexible Tubing

National Stock Number

4720-00-580-7470

Item Name Code

20311

Assigment Date

01/01/1963 (63 years ago)

A flanged cylindrical metallic item designed to be used on tubing to back up the flared end and to provide a bearing surface for the coupling nut, thereby reducing wear on the tubing flare. The inside diameter of the flanged end is countersunk to form a seat for the flare when assembled to a mating fitting.

2b and 2a 2nd end thread class, right-hand 1st end thread direction, 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
Outside Diameter: 0.469 inches minimum and 0.500 inches maximum
Exterior Color: black
End Item Identification: f/a-18 hornet aircraft
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
Thread Quantity Per Inch: 24 2nd end
Burst Test Pressure: 5000.0 pounds per square inch
Layer Composition And Location: 1st layer braided cotton cord and 2nd layer braided cotton cord and outer layer molded rubber, synthetic
Nominal Thread Size: 0.438 inches 1st end
Nominal Thread Size: 0.438 inches and 0.625 inches 2nd end
Seat Angle: 30.0 degrees 1st end
Hydrostatic Test Pressure: 1400.0 pounds per square inch
Criticality Code Justification: feat
Inside Surface Condition: smooth
Measuring Method And Length: 25.219 inches minimum overall and 25.469 inches maximum overall
Special Features: weapon system essential
Media For Which Designed: fuel/oil, hydrocarbon single response
Thread Series Designator: unf 1st end
Thread Series Designator: uns and unf 2nd end

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2530-00-019-7437	No Name Available	09/08/1969
2530-00-212-6940	No Name Available	11/22/1968
4720-00-493-7115	No Name Available	11/24/1973

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
2100591	Nonmetallic Hose Assembly
4960	Nonmetallic Hose Assembly
531958	Nonmetallic Hose Assembly
8344	Nonmetallic Hose Assembly
8380781	Nonmetallic Hose Assembly
FC4960	Nonmetallic Hose Assembly
FC4960F	Nonmetallic Hose Assembly
FC4960G	Nonmetallic Hose Assembly
W-FC4960	Nonmetallic Hose Assembly