4820-00-203-7173

Find complete technical information, availability, and procurement data for: 4820-00-203-7173
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-203-7173

Item Name Code

05487

Assigment Date

01/01/1961 (65 years ago)

threaded renewable seat ring type, disk flow control device, 1.000 inches 1st end nominal pipe size accommodated, 550.0 fahrenheit 1st response maximum operating temp, right-hand all ends thread direction

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: 1.000 inches 1st end
Thread Direction: right-hand all ends
Flow Control Device: disk
Renewable Seat Ring Type: threaded
Maximum Operating Temp: 550.0 fahrenheit 1st response
Maximum Operating Temp: 550.0 fahrenheit 2nd response
Connection Style: plain, optional end (pipe) all ends
Valve Operation Method: automatic
Connection Type: threaded internal pipe all ends
Mounting Position: horizontal
Maximum Operating Pressure: 300.0 pounds per square inch 1st response
Maximum Operating Pressure: 600.0 pounds per square inch 2nd response
Nominal Thread Size: 1.000 inches all ends
Material: copper alloy 922 body
Material: nickel alloy flow control device
Material: nickel alloy seat
Material Document And Classification: qq-c-390,alloy d4/d/ fed spec single material response body
Media For Which Designed: steam 1st response
Media For Which Designed: water-oil-gas 2nd 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Below is a list of NSNs that have been officially superseded by this NSN: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
4820-00-309-2079	No Name Available	09/01/2023
4820-00-959-7334	No Name Available	07/29/1985

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
277-1	Check Valve
962A	Check Valve
DS2161-1-1PC277-1	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-203-7173?

The FSCG of the NSN 4820-00-203-7173 is 4820

Does the NSN 4820-00-203-7173 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-00-203-7173 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 4820-00-203-7173 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-203-7173 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 4820-00-203-7173 was assigned to the Federal Catalog?

It was assigned 65 years ago, on Sun, Jan 1, 1961