401F4S3

View detailed technical data, stock status, and sourcing information for: 401F4S3
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-092-6121

Item Name Code

05488

Assigment Date

03/29/1980 (46 years ago)

A switch that is actuated by changes in ambient temperature. Excludes:circuit breaker; control, temperature (as modified); fuse (as modified); protector, thermal-overload, electrical motor; relay, thermal; and thermostat, flow control. See also control, temperature (as modified) and regulator, temperature (as modified).

spring disk loading method, 225.0 fahrenheit single response maximum operating temp, right-hand all ends thread direction, plain,optional end(pipe) all ends connection style, 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 Direction: right-hand all ends
Flow Control Device: poppet
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
Features Provided: pressure tight outlet side
Maximum Operating Pressure: 650.0 pounds per square inch single response
Nominal Thread Size: 0.250 inches all ends
Opening Pressure Setting: 630.0 pounds per square inch
Material: rubber synthetic seat
Material: steel comp 303 body
Material: steel comp 303 flow control device
Material Document And Classification: qq-s-763,class 303 fed spec single material response body
Media For Which Designed: air single response
Surface Treatment: passivate
Style Designator: straight thru note: to be used for valve bodies of separable sections.
Thread Series Designator: npt 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
401F4Q3	Safety Relief Valve
401F4S3	Safety Relief Valve
5159T-2PP-630	Safety Relief Valve
631AS104	Safety Relief Valve
631AS104-1	Safety Relief Valve
S665-6-1/4SS2	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-092-6121?

The FSCG of the NSN 4820-01-092-6121 is 4820

Does the NSN 4820-01-092-6121 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-092-6121 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 4820-01-092-6121 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-092-6121 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 4820-01-092-6121 was assigned to the Federal Catalog?

It was assigned 46 years ago, on Sat, Mar 29, 1980