4R122-129

View detailed technical data, stock status, and sourcing information for: 4R122-129
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-284-1027

Item Name Code

20520

Assigment Date

09/05/1973 (52 years ago)

poppet flow control device, right-hand all ends thread direction, spring disk loading method, -65.0 fahrenheit 1st response maximum operating temp, 3a all ends 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 all ends
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: flareless all ends
Valve Operation Method: automatic
Connection Type: threaded external tube all ends
Mounting Position: horizontal or vertical
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.438 inches 2nd end
Nominal Thread Size: 0.562 inches 1st end
Seat Angle: 12.0 degrees all ends
Material: steel comp 630 overall
Media For Which Designed: hydraulic fluid, phosphate-ester base single response
Surface Treatment: passivate
Style Designator: straight thru
Thread Series Designator: unjf all ends

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
4R122	Restrictor Check Valve
4R122-129	Restrictor Check Valve
6F2966-129	Restrictor Check Valve
749959-129	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-284-1027?

The FSCG of the NSN 4820-00-284-1027 is 4820

Does the NSN 4820-00-284-1027 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-00-284-1027 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 4820-00-284-1027 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-284-1027 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 4820-00-284-1027 was assigned to the Federal Catalog?

It was assigned 52 years ago, on Wed, Sep 5, 1973