10233963

View detailed technical data, stock status, and sourcing information for: 10233963
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-139-4118

Item Name Code

05488

Assigment Date

09/01/1971 (54 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.

-100.0 fahrenheit 1st response500.0 fahrenheit 2nd response maximum operating temp, right-hand 1st end thread direction, 3a 1st end thread class, poppet flow control device, 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.

Thread Class: 3a 1st end
Thread Direction: right-hand 1st end
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: -100.0 fahrenheit 1st response500.0 fahrenheit 2nd response
Connection Style: plain (tube) 1st end
Valve Operation Method: automatic
Connection Type: threaded external tube 1st end
Maximum Operating Pressure: 200.0 pounds per square inch single response
Nominal Thread Size: 0.750 inches 1st end
Opening Pressure Setting: 148.0 pounds per square inch
Nominal Outside Diameter Tube Accommodated: 0.500 inches 1st end
Special Features: valve size 0.500 in.
Material: aluminum alloy 2024 and plastic polytetrafluoroethylene stem
Material: aluminum alloy 2024 body
Material: aluminum alloy 2024 seat
Material Document And Classification: qq-a-225/6,alloy2024,t4 fed spec 1st material response flow control device
Material Document And Classification: qq-a-225/6,alloy2024,t4 fed spec single material response body
Material Document And Classification: qq-a-225/6,alloy2024,t4 fed spec single material response seat
Media For Which Designed: fuel/oil, hydrocarbon single response
Surface Treatment: anodize
Surface Treatment Document And Classification: mil-a-8625,ty 1 mil spec single treatment response
Style Designator: straight thru
Thread Series Designator: unjf 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
10233963	Safety Relief Valve
520A-8D-148	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-139-4118?

The FSCG of the NSN 4820-00-139-4118 is 4820

Does the NSN 4820-00-139-4118 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-139-4118 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 4820-00-139-4118 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-139-4118 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 4820-00-139-4118 was assigned to the Federal Catalog?

It was assigned 54 years ago, on Wed, Sep 1, 1971