4820-01-257-8660

Find complete technical information, availability, and procurement data for: 4820-01-257-8660
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-257-8660

Item Name Code

05488

Assigment Date

06/25/1987 (39 years ago)

disk flow control device, socket with brazing ring all ends connection style, automatic valve operation method, 0.250 inches all ends nominal pipe size accommodated, los angeles class ssn(688) end item identification

Product Characteristics

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

Nominal Pipe Size Accommodated: 0.250 inches all ends
Flow Control Device: disk
End Item Identification: los angeles class ssn(688)
Connection Style: socket with brazing ring all ends
Valve Operation Method: automatic
Connection Type: unthreaded internal pipe all ends
Adjustable Pressure Range: +136.0 to 150.0 pounds per square inch
Special Features: spring range 110 to 160 pounds
Material: copper alloy body
Material: nickel alloy flow control device
Material: nickel alloy stem
Material Document And Classification: astm a276 assn std single material response stem
Material Document And Classification: astm b61 assn std single material response body lining
Material Document And Classification: qq-n-281 fed spec single material response flow control device
Material Document And Classification: qq-n-281 fed spec single material response seat
Style Designator: angle

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
20271QS41M	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-257-8660?

The FSCG of the NSN 4820-01-257-8660 is 4820

Does the NSN 4820-01-257-8660 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-257-8660 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 4820-01-257-8660 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-257-8660 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 4820-01-257-8660 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Thu, Jun 25, 1987