B4021

View detailed technical data, stock status, and sourcing information for: B4021
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-289-0658

Item Name Code

05487

Assigment Date

01/01/1961 (65 years ago)

A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

automatic valve operation method, ball flow control device, 200.0 fahrenheit single response maximum operating temp, plain (pipe) all ends connection style, 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.

Thread Direction: right-hand all ends
Flow Control Device: ball
Maximum Operating Temp: 200.0 fahrenheit single response
Connection Style: plain (pipe) all ends
Valve Operation Method: automatic
Connection Type: threaded external pipe all ends
Mounting Position: horizontal or vertical
Maximum Operating Pressure: 0.500 pounds per square inch single response
Nominal Thread Size: 0.125 inches all ends
Material: copper alloy body
Material: copper alloy seat
Material: steel flow control device
Media For Which Designed: fuel/oil, hydrocarbon single 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Below is a list of NSNs that have been officially superseded by this NSN: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
2815-00-363-7464	No Name Available	01/01/1960
2910-00-532-9497	No Name Available	01/01/1963

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
5152908	Check Valve
5153357	Check Valve
5329497	Check Valve
B4021	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-289-0658?

The FSCG of the NSN 4820-00-289-0658 is 4820

Does the NSN 4820-00-289-0658 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301010

Does NSN 4820-00-289-0658 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 4820-00-289-0658 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-289-0658 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 4820-00-289-0658 was assigned to the Federal Catalog?

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