4820-01-289-3479

Find complete technical information, availability, and procurement data for: 4820-01-289-3479
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-289-3479

Item Name Code

05488

Assigment Date

11/22/1988 (37 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.

inside screw bonnet type, threaded bonnet attachment method, 3a all ends thread class, poppet flow control device, right-hand all ends thread direction

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 screw
Bonnet Attachment Method: threaded
Maximum Operating Temp: 225.0 fahrenheit single response
Connection Style: flared (tube) all ends
Valve Operation Method: automatic
Connection Type: threaded external tube all ends
Thread Quantity Per Inch: 20 all ends
Adjustable Pressure Range: +40.0 to 125.0 pounds per square inch
Maximum Operating Pressure: 3600.0 pounds per square inch single response
Nominal Thread Size: 0.438 inches all ends
Seat Angle: 37.0 degrees all ends
Material: rubber butadiene-acrylonitrile class nbr seat
Material: steel comp 303 body
Material: steel comp 303 flow control device
Media For Which Designed: air 1st response
Media For Which Designed: hydraulic fluid, mineral base 2nd response
Style Designator: angle
Thread Series Designator: unj 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
649XB-3-1/4-2	Safety Relief Valve
649XB-3-4-2	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-289-3479?

The FSCG of the NSN 4820-01-289-3479 is 4820

Does the NSN 4820-01-289-3479 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-289-3479 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 4820-01-289-3479 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-289-3479 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 4820-01-289-3479 was assigned to the Federal Catalog?

It was assigned 37 years ago, on Tue, Nov 22, 1988