171S-1-1-4-165P

View detailed technical data, stock status, and sourcing information for: 171S-1-1-4-165P
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-021-7735

Item Name Code

05488

Assigment Date

05/20/1976 (50 years ago)

disk flow control device, inside spring bonnet type, spring disk loading method, right-hand all ends thread direction, threaded bonnet attachment method

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: disk
Bonnet Type: inside spring
Bonnet Attachment Method: threaded
Disk Loading Method: spring
Renewable Seat Ring Type: threaded
Maximum Operating Temp: 550.0 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
Adjustable Pressure Range: +0.0 to 400.0 pounds per square inch
Maximum Operating Pressure: 400.0 pounds per square inch single response
Nominal Thread Size: 1.250 inches 1st end
Opening Pressure Setting: 165.0 pounds per square inch
Material: steel comp 316 overall
Material Document And Classification: fed std 66,aisi 316/sae 30316 fed std single material response overall
Style Designator: angle
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
171S-1-1-4-165P	Safety Relief Valve
171S-1-1-4-165PSI	Safety Relief Valve
40M08	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-021-7735?

The FSCG of the NSN 4820-01-021-7735 is 4820

Does the NSN 4820-01-021-7735 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-021-7735 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 4820-01-021-7735 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-021-7735 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 4820-01-021-7735 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Thu, May 20, 1976