4820-00-574-5643

Find complete technical information, availability, and procurement data for: 4820-00-574-5643
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-574-5643

Item Name Code

20520

Assigment Date

03/31/1972 (54 years ago)

3a 2nd end thread class, poppet flow control device, 3b 1st end thread class, right-hand 1st end thread direction, 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 2nd end
Thread Class: 3b 1st end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Flow Control Device: poppet
Disk Loading Method: spring
Connection Style: external seat for gasket seal (boss) 2nd end
Connection Style: gasket seal (boss) 1st end
Valve Operation Method: automatic
Connection Type: threaded external boss 2nd end
Connection Type: threaded internal boss 1st end
Mounting Position: horizontal or vertical
Thread Quantity Per Inch: 18 1st end
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.562 inches 1st end
Nominal Outside Diameter Tube Accommodated: 0.375 inches 1st end
Material: aluminum alloy overall
Media For Which Designed: oil, hydraulic single response
Style Designator: straight thru
Test Data Document: "26512-a51dcvbh027 specification (includes engineering type bulletins, brochures,etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "nominal", etc.)."
Thread Series Designator: unjf 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
6125-4	Restrictor Check Valve
A51H9221-3	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-574-5643?

The FSCG of the NSN 4820-00-574-5643 is 4820

Does the NSN 4820-00-574-5643 have a Schedule B code assigned?

Yes, the Schedule B code is 8481309000

Does NSN 4820-00-574-5643 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 4820-00-574-5643 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-574-5643 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 4820-00-574-5643 was assigned to the Federal Catalog?

It was assigned 54 years ago, on Fri, Mar 31, 1972