524D-20

View detailed technical data, stock status, and sourcing information for: 524D-20
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-820-7659

Item Name Code

05488

Assigment Date

01/01/1963 (63 years ago)

3a 1st end thread class, spring disk loading method, 6.0 cubic feet per minute valve discharge flow rate, right-hand 1st end thread direction, 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 1st end
Thread Direction: right-hand 1st end
Flow Control Device: poppet
Disk Loading Method: spring
Valve Discharge Flow Rate: 6.0 cubic feet per minute
Maximum Operating Temp: -100.0 fahrenheit 1st response400.0 fahrenheit 2nd response
Connection Style: flared (tube) 1st end
Valve Operation Method: automatic
Connection Type: threaded external tube 1st end
Features Provided: pressure tight outlet side
Maximum Operating Pressure: 200.0 pounds per square inch single response
Nominal Thread Size: 0.437 inches 1st end
Seat Angle: 37.0 degrees 1st end
Opening Pressure Setting: 20.0 pounds per square inch
Nominal Outside Diameter Tube Accommodated: 0.250 inches 1st end
Material: aluminum alloy 2024 body
Material: aluminum alloy 2024 flow control device
Media For Which Designed: air 1st response
Media For Which Designed: oil, chlorinated transformer 2nd response
Media For Which Designed: oxygen, gaseous 3rd 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
524A-4D-20	Safety Relief Valve
524D-20	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-820-7659?

The FSCG of the NSN 4820-00-820-7659 is 4820

Does the NSN 4820-00-820-7659 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-820-7659 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 4820-00-820-7659 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-820-7659 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 4820-00-820-7659 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963