4820-01-125-4403

Find complete technical information, availability, and procurement data for: 4820-01-125-4403
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-125-4403

Item Name Code

05487

Assigment Date

01/27/1982 (44 years ago)

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes:valve (1), relief, pressure and temperature.

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

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: ball
Disk Loading Method: spring
Maximum Operating Temp: 350.0 fahrenheit single response
Connection Style: flared (tube) all ends
Valve Operation Method: automatic
Connection Type: threaded external tube all ends
Mounting Position: horizontal or vertical
Maximum Operating Pressure: 1000.0 pounds per square inch single response
Nominal Thread Size: 0.562 inches all ends
Seat Angle: 37.0 degrees all ends
Opening Pressure Setting: 3.0 pounds per square inch
Material: copper alloy body
Material: steel comp 303 flow control device
Material: steel comp 303 seat
Media For Which Designed: hydraulic fluid, mineral base single response
Style Designator: straight thru
Thread Series Designator: unf 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
404HTX-6B-3	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-125-4403?

The FSCG of the NSN 4820-01-125-4403 is 4820

Does the NSN 4820-01-125-4403 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-01-125-4403 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 4820-01-125-4403 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-125-4403 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 4820-01-125-4403 was assigned to the Federal Catalog?

It was assigned 44 years ago, on Wed, Jan 27, 1982