4820-01-344-0668

Find complete technical information, availability, and procurement data for: 4820-01-344-0668
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-344-0668

Item Name Code

05487

Assigment Date

08/22/1991 (34 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, 3a 1st end thread class, poppet flow control device, -65.0 fahrenheit 1st response maximum operating temp, spring disk loading method

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 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
Valve Operation Method: automatic
Connection Type: threaded external tube 1st end
Mounting Position: horizontal
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.563 inches 1st end
Seat Angle: 37.0 degrees 1st end
Material: steel corrosion resisting body
Media For Which Designed: air 2nd response
Media For Which Designed: fuel/oil, hydrocarbon 1st 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
2C9294	Check Valve
7D0161-1	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-344-0668?

The FSCG of the NSN 4820-01-344-0668 is 4820

Does the NSN 4820-01-344-0668 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-01-344-0668 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 4820-01-344-0668 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-344-0668 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 4820-01-344-0668 was assigned to the Federal Catalog?

It was assigned 34 years ago, on Thu, Aug 22, 1991