4820-00-173-7379

Find complete technical information, availability, and procurement data for: 4820-00-173-7379
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-173-7379

Item Name Code

20520

Assigment Date

02/18/1973 (53 years ago)

A gear, cylindrical in form, with straight teeth on the outer surface parallel to the axis of the gear. See also gear, antibacklash, spur. For bulk material, see rod, pinion.

right-hand 1st end thread direction, 3a 1st end thread class, 3a 2nd end thread class, 0.095 inches nominal aperture 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.

Thread Class: 3a 1st end
Thread Class: 3a 2nd end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Aperture Diameter: 0.095 inches nominal
Flow Control Device: poppet
Disk Loading Method: spring
Connection Style: flareless 1st end
Connection Style: flareless 2nd end
Valve Operation Method: automatic
Connection Type: threaded external tube 2nd end
Connection Type: threaded external tube 1st end
Mounting Position: horizontal or vertical
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.562 inches 2nd end
Nominal Thread Size: 0.750 inches 1st end
Seat Angle: 12.0 degrees 1st end
Seat Angle: 12.0 degrees 2nd end
Material: steel corrosion resisting overall
Media For Which Designed: fuel/oil, hydrocarbon single response
Surface Treatment: passivate
Style Designator: straight thru
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
65651-05072-101	Restrictor Check Valve
H421	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-173-7379?

The FSCG of the NSN 4820-00-173-7379 is 4820

Does the NSN 4820-00-173-7379 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-00-173-7379 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 4820-00-173-7379 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-173-7379 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 4820-00-173-7379 was assigned to the Federal Catalog?

It was assigned 53 years ago, on Sun, Feb 18, 1973