4820-00-393-4142

Find complete technical information, availability, and procurement data for: 4820-00-393-4142
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-393-4142

Item Name Code

05487

Assigment Date

04/05/1974 (52 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.

flared (tube) 1st end connection style, 3a 1st end thread class, poppet flow control device, right-hand 1st end thread direction, spring disk loading method

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 1st end
Thread Direction: right-hand 1st end
Flow Control Device: poppet
Disk Loading Method: spring
Connection Style: flared (tube) 1st end
Connection Type: threaded external tube 1st end
Mounting Position: horizontal or vertical
Thread Quantity Per Inch: 18 1st end
Nominal Thread Size: 0.562 inches 1st end
Seat Angle: 37.0 degrees 1st end
Nominal Outside Diameter Tube Accommodated: 0.375 inches 1st end
Material: steel comp 303 body
Material: steel comp 303 seat
Material: steel corrosion resisting flow control device
Surface Treatment: passivate
Style Designator: straight thru
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
44676-8	Check Valve
488-6-SS-T-2	Check Valve
488-6SST-2	Check Valve
488-6SST2	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-393-4142?

The FSCG of the NSN 4820-00-393-4142 is 4820

Does the NSN 4820-00-393-4142 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-00-393-4142 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 4820-00-393-4142 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-393-4142 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 4820-00-393-4142 was assigned to the Federal Catalog?

It was assigned 52 years ago, on Fri, Apr 5, 1974