4820-01-337-3881

Find complete technical information, availability, and procurement data for: 4820-01-337-3881
DODParts.com distributes related products varnishes dopes paints, aircraft parts and consumables, electrical parts, fittings and other components for the aerospace and defense industries. Submit the short price quote form for NSN 4820-01-337-3881 to receive an up to date pricing and availability quote by email.

Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-337-3881

Item Name Code

05488

Assigment Date

04/14/1991 (35 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.

right-hand all ends thread direction, 3b 2nd end thread class, spring disk loading method, poppet flow control device, 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 Class: 3b 2nd end
Thread Direction: right-hand all ends
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: -65.0 fahrenheit 1st response
Maximum Operating Temp: 275.0 fahrenheit 2nd response
Connection Style: flared (tube) 1st end
Connection Style: gasket seal(boss) 2nd end
Valve Operation Method: automatic
Connection Type: threaded external tube 1st end
Connection Type: threaded internal boss 2nd end
Thread Quantity Per Inch: 18 1st end
Maximum Operating Pressure: 2500.0 pounds per square inch single response
Nominal Thread Size: 0.562 inches all ends
Seat Angle: 37.0 degrees 1st end
Opening Pressure Setting: 350.0 pounds per square inch
Material: steel comp 303 body
Media For Which Designed: air 1st response
Media For Which Designed: alcohol, ethyl 2nd response
Media For Which Designed: ammonia, liquid 4th response
Media For Which Designed: ammonia, gaseous 3rd response
Media For Which Designed: refrigerant 12 5th response
Style Designator: straight thru note: to be used for valve bodies of one section only.
Thread Series Designator: unf 2nd end
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
5177T-6TB-350	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-337-3881?

The FSCG of the NSN 4820-01-337-3881 is 4820

Does the NSN 4820-01-337-3881 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-337-3881 require demilitarization?

"commerce control list items (ccli) - mut to the point of scrap required outside the united states. Inside the united states, mut is required when the demil integrity code (ic) is "3" and mut is not required when the demic is "6" (note 8)"

Does NSN 4820-01-337-3881 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-337-3881 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 4820-01-337-3881 was assigned to the Federal Catalog?

It was assigned 35 years ago, on Sun, Apr 14, 1991