1239Y1 1-4IN

View detailed technical data, stock status, and sourcing information for: 1239Y1 1-4IN
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-463-2009

Item Name Code

05487

Assigment Date

03/03/1972 (54 years ago)

550.0 fahrenheit 1st response maximum operating temp, disk flow control device, right-hand all ends thread direction, plain, optional end (pipe) all ends connection style, weight disk loading 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
Disk Loading Method: weight
Maximum Operating Temp: 550.0 fahrenheit 1st 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: 1.250 inches all ends
Special Features: swing check type
Material: copper alloy 922 body
Material: copper alloy 922 flow control device
Material Document And Classification: astm b16 assn std single material response flow control device
Material Document And Classification: astm b61 assn std 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
Specification/Standard Data: 81349-mil-v-18436 government specification
Nondefinitive Spec/Std Data: a group and iii type

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-01-121-9784	No Name Available	09/01/1985

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
1239Y1 1-4IN	Check Valve
1B952-1 1-4IN	Check Valve
428-1 1-4IN	Check Valve
563Y1 1-4IN	Check Valve
76E1 1-4IN	Check Valve
B-364 SZ 1 1/4 IN	Check Valve
B3641 1-4IN	Check Valve
FIG624-1 1-4IN	Check Valve
T-453B 1 1-4IN	Check Valve
T-473B 1 1-4IN	Check Valve
T473B1 1-4IN	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-463-2009?

The FSCG of the NSN 4820-00-463-2009 is 4820

Does the NSN 4820-00-463-2009 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-00-463-2009 require demilitarization?

"commerce control list items (ccli) - mut to the point of scrap required outside the united states. Inside the united states, mut is required when the demil integrity code (ic) is "3" and mut is not required when the demic is "6" (note 8)"

Does NSN 4820-00-463-2009 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-463-2009 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 4820-00-463-2009 was assigned to the Federal Catalog?

It was assigned 54 years ago, on Fri, Mar 3, 1972