4820-00-555-7945

Find complete technical information, availability, and procurement data for: 4820-00-555-7945
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-555-7945

Item Name Code

20520

Assigment Date

01/01/1960 (66 years ago)

spring disk loading method, 0.085 inches nominal aperture diameter, 3b 1st end thread class, right-hand 1st end thread direction, poppet flow control device

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3b 1st end
Thread Direction: right-hand 1st end
Aperture Diameter: 0.085 inches nominal
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: 160.0 fahrenheit single response
Connection Style: swivel nut, flareless (tube) 1st end
Connection Type: threaded internal tube 1st end
Connection Type: threaded internal tube 2nd end
Mounting Position: horizontal
Thread Quantity Per Inch: 18 1st end
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.562 inches 1st end
Seat Angle: 45.0 degrees 1st end
Nominal Outside Diameter Tube Accommodated: 0.375 inches 1st end
Material: rubber synthetic packing
Material: steel body
Material: steel flow control device
Media For Which Designed: hydraulic fluid, phosphate-ester base single response
Style Designator: straight thru
Thread Series Designator: unf 1st end

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
1650-00-585-7023	No Name Available	01/01/1960

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
1116-565564	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-555-7945?

The FSCG of the NSN 4820-00-555-7945 is 4820

Does the NSN 4820-00-555-7945 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-00-555-7945 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 4820-00-555-7945 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-555-7945 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 4820-00-555-7945 was assigned to the Federal Catalog?

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