4820-00-858-2531

Find complete technical information, availability, and procurement data for: 4820-00-858-2531
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-858-2531

Item Name Code

05487

Assigment Date

01/01/1962 (64 years ago)

poppet flow control device, 3a 1st end thread class, right-hand 1st end thread direction, right-hand 2nd end thread direction, 3b 2nd end thread class

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: 3b 2nd end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: 250.0 fahrenheit single response
Connection Style: external seat for gasket seal (boss) 1st end
Connection Style: gasket seal (boss) 2nd end
Valve Operation Method: automatic
Connection Type: threaded external boss 1st end
Connection Type: threaded internal boss 2nd end
Mounting Position: horizontal or vertical
Thread Quantity Per Inch: 16 1st end
Nominal Thread Size: 0.375 inches 1st end
Nominal Thread Size: 0.750 inches 2nd end
Seat Angle: 37.0 degrees 1st end
Special Features: part of oil tank assembly,engine,used on allison propjet,convair model 580 airplane
Material: steel comp 303 flow control device
Material: steel comp 416 body
Material Document And Classification: ams 5640 assn std single material response flow control device
Material Document And Classification: qq-s-753 fed spec single material response body
Media For Which Designed: air single response
Surface Treatment: passivate
Surface Treatment Document And Classification: mil-s-5002 mil spec single treatment response
Style Designator: straight thru
Thread Series Designator: unf 2nd end
Thread Series Designator: unj 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
21R3081-5	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-858-2531?

The FSCG of the NSN 4820-00-858-2531 is 4820

Does the NSN 4820-00-858-2531 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-00-858-2531 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 4820-00-858-2531 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-858-2531 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 4820-00-858-2531 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962