4820-01-168-5673

Find complete technical information, availability, and procurement data for: 4820-01-168-5673
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-168-5673

Item Name Code

05488

Assigment Date

12/20/1983 (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, disk flow control device, 0.500 inches 1st end nominal pipe size accommodated

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
Renewable Seat Ring Type: retaining screw
Valve Operation Method: automatic
Connection Type: butt weld pipe 1st end
Criticality Code Justification: zzzy
Opening Pressure Setting: 241.0 pounds per square inch
Material: copper alloy 922 body
Material: nickel alloy flow control device
Material: nickel alloy body lining
Style Designator: straight thru
Reference Number Differentiating Characteristics: material will be in accordance with ships parts control center activity hx quality control,manufacturing and testing specifications

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
2018600U51M	Safety Relief Valve
20186U51M	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-168-5673?

The FSCG of the NSN 4820-01-168-5673 is 4820

Does the NSN 4820-01-168-5673 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-168-5673 require demilitarization?

Usml or ccl military items - demil required. Item managers,, equipment specialists, or product specialists must furnish special demilinstructions. (note 3).

Does NSN 4820-01-168-5673 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-168-5673 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 4820-01-168-5673 was assigned to the Federal Catalog?

It was assigned 42 years ago, on Tue, Dec 20, 1983