4820-01-257-8679

Find complete technical information, availability, and procurement data for: 4820-01-257-8679
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-257-8679

Item Name Code

06509

Assigment Date

06/25/1987 (39 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.

2a first end thread class, external seat for gasket seal first end style designator, right-hand first end thread direction, threaded external boss first end connection type, straight thru body style

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Body Style: straight thru
First End Connection Type: threaded external boss
First End Style Designator: external seat for gasket seal
First End Thread Class: 2a
First End Thread Direction: right-hand
Flow Control Device: core
End Connection Quantity: 1
Material: copper alloy and steel corrosion resisting body

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
A31482 1/8INCH MPT	Pneumatic Tank Valve

FAQs

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

What is the FSCG of the NSN 4820-01-257-8679?

The FSCG of the NSN 4820-01-257-8679 is 4820

Does the NSN 4820-01-257-8679 have a Schedule B code assigned?

Yes, the Schedule B code is 8481809050

Does NSN 4820-01-257-8679 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 4820-01-257-8679 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-257-8679 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 4820-01-257-8679 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Thu, Jun 25, 1987