4820-01-305-5759

Find complete technical information, availability, and procurement data for: 4820-01-305-5759
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-305-5759

Item Name Code

05488

Assigment Date

08/08/1989 (36 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.

inside spring bonnet type, right-hand 2nd end thread direction, poppet flow control device, 3b 1st end thread class, right-hand 1st end 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: 3b 1st end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Flow Control Device: poppet
Bonnet Type: inside spring
Bonnet Attachment Method: threaded
Disk Loading Method: spring
Maximum Operating Temp: 275.0 fahrenheit single response
Connection Style: flared (tube) 1st end
Connection Style: plain,optional end(pipe) 2nd end
Valve Operation Method: automatic
Connection Type: threaded external boss 1st end
Connection Type: threaded internal pipe 2nd end
Thread Quantity Per Inch: 16 1st end
Maximum Operating Pressure: 2500.0 pounds per square inch single response
Nominal Thread Size: 0.750 inches 2nd end
Nominal Thread Size: 0.750 inches 1st end
Seat Angle: 37.0 degrees 1st end
Opening Pressure Setting: 350.0 pounds per square inch
Special Features: with lockwire
Material: steel comp 303 overall
Media For Which Designed: acetylene 1st response
Media For Which Designed: air 2nd response
Media For Which Designed: fuel/oil, hydrocarbon 3rd response
Style Designator: straight thru note: to be used for valve bodies of one section only.
Thread Series Designator: npt 2nd end
Thread Series Designator: unj 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
5159-T8TB-L350	Safety Relief Valve
K5159 T-8TB L350	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-305-5759?

The FSCG of the NSN 4820-01-305-5759 is 4820

Does the NSN 4820-01-305-5759 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-305-5759 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 4820-01-305-5759 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-305-5759 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 4820-01-305-5759 was assigned to the Federal Catalog?

It was assigned 36 years ago, on Tue, Aug 8, 1989