P43-776

View detailed technical data, stock status, and sourcing information for: P43-776
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-388-5391

Item Name Code

05488

Assigment Date

04/01/1994 (32 years ago)

An electromechanical device which releases the holding mechanism and permits the contacts of a circuit breaker to open. It is a replacement part of a circuit breaker. Does not include relays. See also thermal release, circuit breaker.

3a all ends thread class, disk flow control device, spring disk loading method, right-hand all ends thread direction, 15.0 pounds per hour valve discharge flow rate

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 all ends
Thread Direction: right-hand all ends
Flow Control Device: disk
Disk Loading Method: spring
Valve Discharge Flow Rate: 15.0 pounds per hour
Maximum Operating Temp: 140.0 fahrenheit single response
End Item Identification: 2350-01-087-1095
Connection Style: external seat for gasket seal (boss) all ends
Valve Operation Method: automatic
Connection Type: threaded external boss all ends
Thread Quantity Per Inch: 12 all ends
Maximum Operating Pressure: 6000.0 pounds per square inch single response
Nominal Thread Size: 1.062 inches all ends
Seat Angle: 37.0 degrees all ends
Opening Pressure Setting: 4250.0 pounds per square inch
Special Features: cartridge type
Material: steel corrosion resisting body
Style Designator: screw-in cartridge
Thread Series Designator: un all ends

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-01-076-6827	No Name Available	07/01/2001

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
12283306	Safety Relief Valve
9338668	Safety Relief Valve
C1940-01	Safety Relief Valve
P43-776	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-388-5391?

The FSCG of the NSN 4820-01-388-5391 is 4820

Does the NSN 4820-01-388-5391 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-388-5391 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 4820-01-388-5391 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-388-5391 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 4820-01-388-5391 was assigned to the Federal Catalog?

It was assigned 32 years ago, on Fri, Apr 1, 1994