4820-01-339-7821

Find complete technical information, availability, and procurement data for: 4820-01-339-7821
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-339-7821

Item Name Code

05488

Assigment Date

05/30/1991 (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.

threaded external boss all ends connection type, right-hand all ends thread direction, automatic valve operation method, 3a all ends thread class, external seat for gasket seal (boss) all ends connection style

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
Connection Style: external seat for gasket seal (boss) all ends
Valve Operation Method: automatic
Connection Type: threaded external boss all ends
Thread Quantity Per Inch: 12 all ends
Adjustable Pressure Range: +1.5 to 2.5 pounds per square inch
Nominal Thread Size: 1.062 inches all ends
Seat Angle: 37.0 degrees all ends
Material: aluminum body
Thread Series Designator: un 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
12P125	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-339-7821?

The FSCG of the NSN 4820-01-339-7821 is 4820

Does the NSN 4820-01-339-7821 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-339-7821 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 4820-01-339-7821 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-339-7821 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 4820-01-339-7821 was assigned to the Federal Catalog?

It was assigned 35 years ago, on Thu, May 30, 1991