4820-01-337-4518

Find complete technical information, availability, and procurement data for: 4820-01-337-4518
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-337-4518

Item Name Code

05488

Assigment Date

04/14/1991 (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.

right-hand all ends thread direction, spring disk loading method, disk flow control device, inside spring bonnet type, integral bonnet attachment method

Product Characteristics

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

Thread Direction: right-hand all ends
Flow Control Device: disk
Bonnet Type: inside spring
Bonnet Attachment Method: integral
Disk Loading Method: spring
Connection Style: plain (pipe) 1st endplain,optional end(pipe) 2nd end
Valve Operation Method: automatic
Connection Type: threaded external pipe 1st endthreaded internal pipe 2nd end
Nominal Thread Size: 1.250 inches all ends
Opening Pressure Setting: 165.0 pounds per square inch
Material: copper alloy overall
Media For Which Designed: water, fresh single response
Style Designator: angle
Thread Series Designator: npt 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
508-0037-16-165	Safety Relief Valve
6779-04 SET 165 PSI	Safety Relief Valve
770NCFF-N	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-337-4518?

The FSCG of the NSN 4820-01-337-4518 is 4820

Does the NSN 4820-01-337-4518 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-337-4518 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 4820-01-337-4518 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-337-4518 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 4820-01-337-4518 was assigned to the Federal Catalog?

It was assigned 35 years ago, on Sun, Apr 14, 1991