4820-01-128-2255

Find complete technical information, availability, and procurement data for: 4820-01-128-2255
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-128-2255

Item Name Code

05487

Assigment Date

03/18/1982 (44 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.

225.0 fahrenheit single response maximum operating temp, disk flow control device, grooved (tube) 2nd end connection style, right-hand 1st end thread direction, 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: disk
Maximum Operating Temp: 225.0 fahrenheit single response
Connection Style: grooved (tube) 2nd end
Connection Style: plain (tube) 1st end
Valve Operation Method: automatic
Connection Type: threaded external tube 1st end
Connection Type: unthreaded external tube 2nd end
Mounting Position: horizontal or vertical
Maximum Operating Pressure: 150.0 pounds per square inch single response
Nominal Thread Size: 0.875 inches 1st end
Nominal Outside Diameter Tube Accommodated: 0.812 inches 2nd end
Material: aluminum alloy 2024 body
Material: rubber butadiene-acrylonitrile class nbr seat
Material Document And Classification: mil-p-5315 mil spec single material response seat
Material Document And Classification: qq-a-225/6,alloy 2024 fed spec single material response body
Media For Which Designed: fuel/oil, hydrocarbon single 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
10124578	Check Valve
2S2862	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-128-2255?

The FSCG of the NSN 4820-01-128-2255 is 4820

Does the NSN 4820-01-128-2255 have a Schedule B code assigned?

Yes, the Schedule B code is 8481309000

Does NSN 4820-01-128-2255 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 4820-01-128-2255 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-128-2255 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 4820-01-128-2255 was assigned to the Federal Catalog?

It was assigned 44 years ago, on Thu, Mar 18, 1982