4820-01-189-8525

Find complete technical information, availability, and procurement data for: 4820-01-189-8525
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-189-8525

Item Name Code

05488

Assigment Date

09/20/1984 (41 years ago)

integral bonnet attachment method, right-hand all ends thread direction, poppet flow control device, inside spring bonnet type, 3a all ends 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 all ends
Thread Direction: right-hand all ends
Flow Control Device: poppet
Bonnet Type: inside spring
Bonnet Attachment Method: integral
Disk Loading Method: spring
Maximum Operating Temp: -100.0 fahrenheit 1st response
Maximum Operating Temp: 400.0 fahrenheit 2nd response
Connection Style: plain (tube) all ends
Valve Operation Method: automatic
Connection Type: threaded external tube all ends
Thread Quantity Per Inch: 20 all ends
Maximum Operating Pressure: 200.0 pounds per square inch single response
Nominal Thread Size: 0.438 inches all ends
Opening Pressure Setting: 130.0 pounds per square inch
Special Features: deflector cap
Material: aluminum alloy 2024 body
Material: silicon seat
Material Document And Classification: qq-a-225/6 fed spec single material response body
Media For Which Designed: air 1st response
Media For Which Designed: carbon dioxide 2nd response
Media For Which Designed: helium 3rd response
Media For Which Designed: hydrogen 4th response
Media For Which Designed: nitrogen, gaseous 5th response
Surface Treatment: anodize
Surface Treatment Document And Classification: mil-a-8625a mil spec single treatment response
Style Designator: straight thru w/baffle
Thread Series Designator: unjf all ends
Furnished Items And Quantity: 1 deflector cap

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
D520A-4D-130	Safety Relief Valve
D524A-4D-130	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-189-8525?

The FSCG of the NSN 4820-01-189-8525 is 4820

Does the NSN 4820-01-189-8525 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-189-8525 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 4820-01-189-8525 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-189-8525 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 4820-01-189-8525 was assigned to the Federal Catalog?

It was assigned 41 years ago, on Thu, Sep 20, 1984