831703

View detailed technical data, stock status, and sourcing information for: 831703
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-699-0521

Item Name Code

05488

Assigment Date

01/01/1963 (63 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.

poppet flow control device, right-hand 2nd end thread direction, 0.125 inches 2nd end nominal pipe size accommodated, right-hand 1st end thread direction, 3b 1st end thread class

Product Characteristics

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

Nominal Pipe Size Accommodated: 0.125 inches 2nd end
Thread Class: 3b 1st end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Flow Control Device: poppet
Disk Loading Method: spring
Connection Style: flared (tube) 1st end
Connection Style: plain (pipe) 2nd end
Valve Operation Method: automatic
Connection Type: threaded external pipe 2nd end
Connection Type: threaded external tube 1st end
Thread Quantity Per Inch: 20 1st end
Thread Quantity Per Inch: 27 2nd end
Nominal Thread Size: 0.125 inches 2nd end
Nominal Thread Size: 0.437 inches 1st end
Seat Angle: 37.0 degrees 1st end
Nominal Outside Diameter Tube Accommodated: 0.250 inches 1st end
Material: aluminum alloy 2014 body
Material Document And Classification: qq-a-225/4,alloy2014 fed spec single material response body
Surface Treatment: anodize
Style Designator: angle
Thread Series Designator: npt 2nd end
Thread Series Designator: unf 1st end

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
802258	Safety Relief Valve
831703	Safety Relief Valve
K802258	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-699-0521?

The FSCG of the NSN 4820-00-699-0521 is 4820

Does the NSN 4820-00-699-0521 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-699-0521 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 4820-00-699-0521 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-699-0521 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 4820-00-699-0521 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963