4820-00-777-3256

Find complete technical information, availability, and procurement data for: 4820-00-777-3256
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-777-3256

Item Name Code

05488

Assigment Date

01/01/1962 (64 years ago)

right-hand 1st end thread direction, pressed-in renewable seat ring type, spring disk loading method, poppet flow control device, 0.250 inches 1st 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
Thread Direction: right-hand 1st end
Flow Control Device: poppet
Disk Loading Method: spring
Renewable Seat Ring Type: pressed-in
Maximum Operating Temp: 450.0 fahrenheit single response
Connection Style: plain (pipe) 1st end
Valve Operation Method: automatic
Connection Type: threaded external pipe 1st end
Features Provided: pressure tight outlet side
Adjustable Pressure Range: +3.0 to 5.0 pounds per square inch
Nominal Thread Size: 0.250 inches 1st end
Special Features: inline popoff
Material: copper alloy 377 flow control device
Material: copper alloy body lining
Material: copper alloy seat
Material: rubber silicone class q packing
Material Document And Classification: ams 3304 assn std single material response flow control device
Media For Which Designed: air 1st response
Media For Which Designed: oil, chlorinated transformer 2nd response
Media For Which Designed: oxygen, gaseous 3rd response
Style Designator: straight thru
Thread Series Designator: npt 1st end

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-494-9385	No Name Available	03/01/1992

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
013-1102-000	Safety Relief Valve
524B-2M-3.5	Safety Relief Valve
524B-2M-35	Safety Relief Valve
524B2M 3.0 TO 5.0PSI	Safety Relief Valve
524B2M3-5	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-777-3256?

The FSCG of the NSN 4820-00-777-3256 is 4820

Does the NSN 4820-00-777-3256 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-777-3256 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 4820-00-777-3256 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-777-3256 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 4820-00-777-3256 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962