4820-01-321-6400

Find complete technical information, availability, and procurement data for: 4820-01-321-6400
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-321-6400

Item Name Code

05488

Assigment Date

06/20/1990 (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.

0.375 inches all ends nominal pipe size accommodated, union bonnet attachment method, disk flow control device, inside spring bonnet type, 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.

Nominal Pipe Size Accommodated: 0.375 inches all ends
Flow Control Device: disk
Bonnet Type: inside spring
Bonnet Attachment Method: union
Disk Loading Method: spring
Connection Style: socket with brazing ring all ends
Valve Operation Method: automatic
Connection Type: unthreaded internal pipe all ends
Adjustable Pressure Range: +20.0 to 35.0 pounds per square inch
Material: copper alloy body
Material: nickel alloy seat
Material: nickel alloy stem
Material: rubber butadiene-acrylonitrile class nbr flow control device
Material: rubber butadiene-acrylonitrile class nbr packing
Style Designator: angle

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
1385 B/M 20477735 3/8IN	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-321-6400?

The FSCG of the NSN 4820-01-321-6400 is 4820

Does the NSN 4820-01-321-6400 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-321-6400 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 4820-01-321-6400 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-321-6400 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 4820-01-321-6400 was assigned to the Federal Catalog?

It was assigned 36 years ago, on Wed, Jun 20, 1990