4820-01-397-8587

Find complete technical information, availability, and procurement data for: 4820-01-397-8587
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-397-8587

Item Name Code

20962

Assigment Date

10/21/1994 (31 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.

threaded internal pipe all ends connection type, plain,optional end(pipe) all ends connection style, right-hand all ends thread direction, manual valve operation method, 1730-01-272-4402 end item identification

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
End Item Identification: 1730-01-272-4402
Connection Style: plain,optional end(pipe) all ends
Valve Operation Method: manual
Connection Type: threaded internal pipe all ends
Maximum Operating Pressure: 600.0 pounds per square inch single response
Nominal Thread Size: 0.500 inches all ends
Special Features: with mounting pad
Material: bronze body
Material: chromium flow control device
Material: plastic polytetrafluoroethylene seat
Media For Which Designed: water-oil-gas single response
Style Designator: straight thru
Thread Series Designator: npt all ends

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4920-01-582-9875	No Name Available	01/01/2016

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
77-103 .50IN	Ball Valve
77-103-01	Ball Valve

FAQs

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

What is the FSCG of the NSN 4820-01-397-8587?

The FSCG of the NSN 4820-01-397-8587 is 4820

Does the NSN 4820-01-397-8587 have a Schedule B code assigned?

Yes, the Schedule B code is 8481805090

Does NSN 4820-01-397-8587 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 4820-01-397-8587 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-397-8587 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 4820-01-397-8587 was assigned to the Federal Catalog?

It was assigned 31 years ago, on Fri, Oct 21, 1994