B2251-4

View detailed technical data, stock status, and sourcing information for: B2251-4
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-288-6678

Item Name Code

05487

Assigment Date

01/01/1963 (63 years ago)

406.0 fahrenheit 1st response maximum operating temp, disk flow control device, right-hand all ends thread direction, 150.0 fahrenheit 2nd response maximum operating temp, 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: 150.0 fahrenheit 2nd response
Maximum Operating Temp: 406.0 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 or vertical
Maximum Operating Pressure: 125.0 pounds per square inch 1st response
Maximum Operating Pressure: 200.0 pounds per square inch 2nd response
Nominal Thread Size: 0.750 inches all ends
Material: copper alloy overall
Material Document And Classification: astmcub000 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

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4820-00-227-0146	No Name Available	08/01/1978
4820-00-288-7149	No Name Available	09/30/1966
4820-00-288-9158	No Name Available	03/14/1969
4820-00-541-8724	No Name Available	09/01/2023
4820-00-684-0374	No Name Available	10/05/1966
4820-00-821-9833	No Name Available	02/12/1969
4820-00-822-4646	No Name Available	04/06/1967
4820-00-838-2747	No Name Available	09/01/2023
4820-00-879-8360	No Name Available	02/12/1969
4820-01-266-3637	No Name Available	12/01/1991

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
03-4048	Check Valve
298 3-4	Check Valve
34-3-4	Check Valve
509-002-3/4IN	Check Valve
509-3-4 CID882037120	Check Valve
514-001-3/4IN	Check Valve
514-001-3/4INCID882039252	Check Valve
B-319 0.75IN	Check Valve
B-319 3/4IN	Check Valve
B-319 SZ 3/4 IN	Check Valve
B2251-4	Check Valve
B319-3-4IN	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-288-6678?

The FSCG of the NSN 4820-00-288-6678 is 4820

Does the NSN 4820-00-288-6678 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-00-288-6678 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 4820-00-288-6678 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-288-6678 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 4820-00-288-6678 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963