4820-00-148-8665

Find complete technical information, availability, and procurement data for: 4820-00-148-8665
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-148-8665

Item Name Code

05488

Assigment Date

08/25/1973 (52 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.

250.0 fahrenheit single response maximum operating temp, -65.0 fahrenheit minimum operating temp, spring disk loading method, disk flow control device, right-hand 1st end thread direction

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 1st end
Flow Control Device: disk
Disk Loading Method: spring
Maximum Operating Temp: 250.0 fahrenheit single response
Minimum Operating Temp: -65.0 fahrenheit
Connection Style: plain (pipe) 1st end
Valve Operation Method: automatic
Connection Type: threaded external pipe 1st end
Nominal Thread Size: 0.250 inches 1st end
Opening Pressure Setting: 20.0 pounds per square inch
Material: steel overall
Media For Which Designed: air 1st response
Media For Which Designed: helium 2nd response
Style Designator: straight thru
Thread Series Designator: npt 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
1944-001	Safety Relief Valve
1944-1-000	Safety Relief Valve
2391244-6-4	Safety Relief Valve
2820185	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-148-8665?

The FSCG of the NSN 4820-00-148-8665 is 4820

Does the NSN 4820-00-148-8665 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-148-8665 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 4820-00-148-8665 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-148-8665 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 4820-00-148-8665 was assigned to the Federal Catalog?

It was assigned 52 years ago, on Sat, Aug 25, 1973