20249-4-817

View detailed technical data, stock status, and sourcing information for: 20249-4-817
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-022-8593

Item Name Code

05488

Assigment Date

06/07/1976 (50 years ago)

disk flow control device, forrestal class cv end item identification, 2b all ends thread class, spring disk loading method, 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 Class: 2b all ends
Thread Direction: right-hand all ends
Flow Control Device: disk
Disk Loading Method: spring
End Item Identification: forrestal class cv
Connection Style: gasket seal(boss) all ends
Valve Operation Method: automatic
Connection Type: threaded internal boss all ends
Thread Quantity Per Inch: 12 all ends
Adjustable Pressure Range: +2000.0 to 3000.0 pounds per square inch
Nominal Thread Size: 1.062 inches all ends
Material: nickel alloy 400 overall
Material Document And Classification: astm b164-61,class a assn std single material response overall
Style Designator: angle
Thread Series Designator: un all ends

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
20249-4-817	Safety Relief Valve
20249-4-817-2500	Safety Relief Valve
20249-4-87	Safety Relief Valve
4820PL1242700	Safety Relief Valve
817-3-4IN2000T3	Safety Relief Valve
817-3-4IN2000T3000PSI	Safety Relief Valve
D45MS-01 3/4	Safety Relief Valve
D45MS-01-3/4-3/4	Safety Relief Valve
W112181	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-022-8593?

The FSCG of the NSN 4820-01-022-8593 is 4820

Does the NSN 4820-01-022-8593 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-022-8593 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 4820-01-022-8593 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-022-8593 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 4820-01-022-8593 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Mon, Jun 7, 1976