4820-01-339-8490

Find complete technical information, availability, and procurement data for: 4820-01-339-8490
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-339-8490

Item Name Code

05487

Assigment Date

06/02/1991 (35 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.

disk flow control device, 3a all ends thread class, automatic valve operation method, flareless all ends connection style, 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: disk
Connection Style: flareless all ends
Valve Operation Method: automatic
Connection Type: threaded external tube all ends
Mounting Position: horizontal
Thread Quantity Per Inch: 18 all ends
Nominal Thread Size: 0.562 inches all ends
Seat Angle: 12.0 degrees all ends
Material: steel comp 304 body
Style Designator: tee
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
SS70-912Y-6J	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-339-8490?

The FSCG of the NSN 4820-01-339-8490 is 4820

Does NSN 4820-01-339-8490 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 4820-01-339-8490 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-339-8490 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 4820-01-339-8490 was assigned to the Federal Catalog?

It was assigned 35 years ago, on Sun, Jun 2, 1991