684-2-1-1/4B25

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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-727-8028

Item Name Code

05488

Assigment Date

01/01/1963 (63 years ago)

right-hand 2nd end thread direction, 0.250 inches 1st end nominal pipe size accommodated, poppet flow control device, right-hand 1st end thread direction, 0.250 inches 2nd end nominal pipe size accommodated

Product Characteristics

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

Nominal Pipe Size Accommodated: 0.250 inches 1st end
Nominal Pipe Size Accommodated: 0.250 inches 2nd end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Flow Control Device: poppet
Bonnet Type: inside screw
Bonnet Attachment Method: integral
Disk Loading Method: spring
Maximum Operating Temp: 180.0 fahrenheit single response
Connection Style: plain (pipe) 2nd end
Connection Style: plain,optional end(pipe) 1st end
Valve Operation Method: automatic
Connection Type: threaded external pipe 2nd end
Connection Type: threaded internal pipe 1st end
Features Provided: pressure tight outlet side
Thread Quantity Per Inch: 18 2nd end
Maximum Operating Pressure: 50.0 pounds per square inch single response
Nominal Thread Size: 0.250 inches 1st end
Nominal Thread Size: 0.250 inches 2nd end
Opening Pressure Setting: 25.0 pounds per square inch
Material: copper alloy body
Material: copper alloy seat
Material: steel comp 303 and rubber butadiene-acrylonitrile class nbr flow control device
Material Document And Classification: fed std 66 fed std 1st material response flow control device
Media For Which Designed: air 1st response
Media For Which Designed: gas, natural 2nd response
Thread Series Designator: npt 2nd end
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
1390424	Safety Relief Valve
684-2-1-1/4B25	Safety Relief Valve
684-2-1/4B2	Safety Relief Valve
684-2-1/4B25	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-727-8028?

The FSCG of the NSN 4820-00-727-8028 is 4820

Does the NSN 4820-00-727-8028 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-727-8028 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 4820-00-727-8028 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-727-8028 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 4820-00-727-8028 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963