65A81C1037

View detailed technical data, stock status, and sourcing information for: 65A81C1037
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-331-3537

Item Name Code

05488

Assigment Date

12/16/1973 (52 years ago)

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

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
Disk Loading Method: spring
Maximum Operating Temp: 250.0 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
Thread Quantity Per Inch: 18 1st end
Thread Quantity Per Inch: 18 2nd end
Maximum Operating Pressure: 200.0 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: 20.0 pounds per square inch
Material: copper alloy body
Material: copper alloy seat
Material: steel corrosion resisting flow control device
Media For Which Designed: air 1st response
Media For Which Designed: fuel/oil, hydrocarbon 2nd response
Media For Which Designed: nitrogen, gaseous 3rd response
Style Designator: straight thru
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
65A81C1037	Safety Relief Valve
P66-673	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-331-3537?

The FSCG of the NSN 4820-00-331-3537 is 4820

Does the NSN 4820-00-331-3537 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-331-3537 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 4820-00-331-3537 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-331-3537 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 4820-00-331-3537 was assigned to the Federal Catalog?

It was assigned 52 years ago, on Sun, Dec 16, 1973