4820-00-816-4496

Find complete technical information, availability, and procurement data for: 4820-00-816-4496
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-816-4496

Item Name Code

20520

Assigment Date

01/01/1960 (66 years ago)

A circuit-protecting device which provides a discharge path for abnormal surges of high potential while consuming little or no power at normal operating voltage. Excludes:items which absorb continuously recurring cyclic pulses. For resistors which are sensitive to voltage changes or used as elements in surge arresters, see resistor, voltage sensitive. See also absorber, overvoltage; and cutout disk, protective.

right-hand 1st end thread direction, 3a 1st end thread class, poppet flow control device, spring disk loading method, flared (tube) 1st end connection style

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 1st end
Flow Control Device: poppet
Disk Loading Method: spring
Connection Style: flared (tube) 1st end
Connection Type: threaded external tube 1st end
Mounting Position: horizontal
Thread Quantity Per Inch: 16 1st end
Maximum Operating Pressure: 4800.0 pounds per square inch single response
Nominal Thread Size: 0.750 inches 1st end
Seat Angle: 37.0 degrees 1st end
Nominal Outside Diameter Tube Accommodated: 0.500 inches 1st end
Special Features: over-all dim.,3.533 in. lg,1.125 in. across flats
Material: aluminum alloy body
Material: rubber synthetic packing
Media For Which Designed: hydraulic fluid, phosphate-ester base single response
Surface Treatment: anodize
Style Designator: straight thru
Thread Series Designator: unf 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
1R3683-65	Restrictor Check Valve
32-69004	Restrictor Check Valve
32-69004-65	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-816-4496?

The FSCG of the NSN 4820-00-816-4496 is 4820

Does the NSN 4820-00-816-4496 have a Schedule B code assigned?

Yes, the Schedule B code is 8481309000

Does NSN 4820-00-816-4496 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 4820-00-816-4496 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-816-4496 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 4820-00-816-4496 was assigned to the Federal Catalog?

It was assigned 66 years ago, on Fri, Jan 1, 1960