4820-01-171-4392

Find complete technical information, availability, and procurement data for: 4820-01-171-4392
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-171-4392

Item Name Code

05488

Assigment Date

02/07/1984 (42 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, bolted bonnet attachment method, spring disk loading method, 0.500 inches 1st end nominal pipe size accommodated, disk flow control device

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: 0.500 inches 1st end
Flow Control Device: disk
Bonnet Type: inside spring
Bonnet Attachment Method: bolted
Disk Loading Method: spring
Connection Style: gasket seal (pipe) 1st end
Valve Operation Method: automatic
Connection Type: unthreaded internal pipe 1st end
Adjustable Pressure Range: +45.0 to 55.0 pounds per square inch
Criticality Code Justification: zzzy
Material: copper alloy 922 body
Material: nickel alloy 400 or nickel alloy r-405 flow control device
Material: nickel alloy 400 or nickel alloy r-405 seat
Material: nickel alloy 400 or nickel alloy r-405 stem
Style Designator: angle
Reference Number Differentiating Characteristics: cleaning, packaging, and marking iaw mil-std-1330d

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
20210H51M	Safety Relief Valve
20210H51MCP	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-171-4392?

The FSCG of the NSN 4820-01-171-4392 is 4820

Does the NSN 4820-01-171-4392 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-171-4392 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 4820-01-171-4392 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-171-4392 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 4820-01-171-4392 was assigned to the Federal Catalog?

It was assigned 42 years ago, on Tue, Feb 7, 1984