6631-3-8S2-1.5

View detailed technical data, stock status, and sourcing information for: 6631-3-8S2-1.5
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-027-3590

Item Name Code

20520

Assigment Date

09/16/1976 (49 years ago)

spring disk loading method, right-hand all ends thread direction, piston flow control device, plain, optional end (pipe) all ends connection style, 225.0 fahrenheit single response maximum operating temp

Product Characteristics

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

Thread Direction: right-hand all ends
Flow Control Device: piston
Disk Loading Method: spring
Maximum Operating Temp: 225.0 fahrenheit single response
Connection Style: plain, optional end (pipe) all ends
Valve Operation Method: automatic
Connection Type: threaded internal pipe all ends
Mounting Position: horizontal or vertical
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.375 inches all ends
Material: steel body
Material: steel corrosion resisting flow control device
Media For Which Designed: oil, hydraulic single response
Style Designator: straight thru
Thread Series Designator: npt all ends

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-541-5547	No Name Available	07/01/1983

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
16A101-3	Restrictor Check Valve
2438872-1	Restrictor Check Valve
663-3-8D2-1-5	Restrictor Check Valve
6631-3-8S2-1.5	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-027-3590?

The FSCG of the NSN 4820-01-027-3590 is 4820

Does the NSN 4820-01-027-3590 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-01-027-3590 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 4820-01-027-3590 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-027-3590 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 4820-01-027-3590 was assigned to the Federal Catalog?

It was assigned 49 years ago, on Thu, Sep 16, 1976