4820-00-431-3992

Find complete technical information, availability, and procurement data for: 4820-00-431-3992
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-431-3992

Item Name Code

20520

Assigment Date

04/28/1971 (55 years ago)

spring disk loading method, 3a all ends thread class, poppet flow control device, right-hand all ends thread direction, 275.0 fahrenheit single response maximum operating temp

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
Disk Loading Method: spring
Maximum Operating Temp: 275.0 fahrenheit single response
Connection Style: flareless all ends
Valve Operation Method: automatic
Connection Type: threaded external tube all ends
Mounting Position: horizontal or vertical
Thread Quantity Per Inch: 20 1st end
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.437 inches all ends
Seat Angle: 12.0 degrees all ends
Special Features: with filter
Material: aluminum alloy 2024 body
Material: aluminum alloy 2024 seat
Material: rubber packing
Material: steel corrosion resisting flow control device
Material Document And Classification: qq-a-225/6 fed spec single material response body
Material Document And Classification: qq-a-225/6 fed spec single material response seat
Media For Which Designed: hydraulic fluid, mineral base single response
Surface Treatment: anodize
Surface Treatment Document And Classification: mil-a-8625,ty 2 mil spec single treatment response
Style Designator: straight thru
Thread Series Designator: unjf all ends

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
1R3441-5-5	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-431-3992?

The FSCG of the NSN 4820-00-431-3992 is 4820

Does the NSN 4820-00-431-3992 have a Schedule B code assigned?

Yes, the Schedule B code is 8481309000

Does NSN 4820-00-431-3992 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 4820-00-431-3992 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-431-3992 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 4820-00-431-3992 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Wed, Apr 28, 1971