4820-00-080-3858

Find complete technical information, availability, and procurement data for: 4820-00-080-3858
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-080-3858

Item Name Code

20520

Assigment Date

11/22/1972 (53 years ago)

A valve having an orifice in the poppet, disk, or the like, to permit restricted fluid flow when the valve is seated. It does not have a stem or provisions for pressure adjustments, and is similar to a valve, check with the exception of the orifice which permits fluid flow in more than one direction.

right-hand all ends thread direction, 3b 1st end thread class, 1.250 inches nominal aperture diameter, 3a 2nd end thread class, poppet flow control device

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 2nd end
Thread Class: 3b 1st end
Thread Direction: right-hand all ends
Aperture Diameter: 1.250 inches nominal
Flow Control Device: poppet
Maximum Operating Temp: 200.0 fahrenheit single response
Connection Style: external seat for gasket seal (boss) 2nd end
Connection Style: plain, optional end (pipe) 1st end
Valve Operation Method: automatic
Connection Type: threaded external boss 2nd end
Connection Type: threaded internal pipe 1st end
Mounting Position: horizontal or vertical
Thread Quantity Per Inch: 16 2nd end
Maximum Operating Pressure: 5000.0 pounds per square inch single response
Nominal Thread Size: 0.500 inches 1st end
Nominal Thread Size: 0.750 inches 2nd end
Material: copper alloy overall
Media For Which Designed: hydraulic fluid, mineral base single response
Style Designator: straight thru
Thread Series Designator: npt 1st end
Thread Series Designator: unj 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
1429-8SAE4GPM	Restrictor Check Valve
FF3-NKP0-04S-4GPM	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-080-3858?

The FSCG of the NSN 4820-00-080-3858 is 4820

Does the NSN 4820-00-080-3858 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-00-080-3858 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 4820-00-080-3858 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-080-3858 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 4820-00-080-3858 was assigned to the Federal Catalog?

It was assigned 53 years ago, on Wed, Nov 22, 1972