4820-00-102-9720

Find complete technical information, availability, and procurement data for: 4820-00-102-9720
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-102-9720

Item Name Code

05488

Assigment Date

06/12/1968 (58 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.

spring disk loading method, external seat for gasket seal (boss) 1st end connection style, right-hand 1st end thread direction, poppet flow control device, 3a 1st end thread class

Product Characteristics

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

Thread Class: 3a 1st end
Thread Direction: right-hand 1st end
Flow Control Device: poppet
Disk Loading Method: spring
Connection Style: external seat for gasket seal (boss) 1st end
Valve Operation Method: automatic
Connection Type: threaded external boss 1st end
Thread Quantity Per Inch: 12 1st end
Nominal Thread Size: 1.312 inches 1st end
Opening Pressure Setting: 4.0 pounds per square inch
Material: steel comp 303 and rubber butadiene-acrylonitrile class nbr flow control device
Material: steel comp 303 body
Material: steel comp 303 seat
Material Document And Classification: fed std 66,aisi 303/sae 30303 fed std 1st material response flow control device
Material Document And Classification: fed std 66,aisi 303/sae 30303 fed std single material response body
Material Document And Classification: fed std 66,aisi 303/sae 30303 fed std single material response seat
Surface Treatment: passivate
Style Designator: straight thru w/baffle
Thread Series Designator: un 1st end

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
D559T16D4	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-102-9720?

The FSCG of the NSN 4820-00-102-9720 is 4820

Does the NSN 4820-00-102-9720 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-102-9720 require demilitarization?

"commerce control list items (ccli) - mut to the point of scrap required outside the united states. Inside the united states, mut is required when the demil integrity code (ic) is "3" and mut is not required when the demic is "6" (note 8)"

Does NSN 4820-00-102-9720 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-102-9720 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 4820-00-102-9720 was assigned to the Federal Catalog?

It was assigned 58 years ago, on Wed, Jun 12, 1968