4820-00-521-5994

Find complete technical information, availability, and procurement data for: 4820-00-521-5994
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-521-5994

Item Name Code

16989

Assigment Date

01/01/1963 (63 years ago)

right-hand 1st end thread direction, 3a 1st end thread class, poppet flow control device, manual valve operation method, external seat for gasket seal (boss) 1st end connection style

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3a 1st end
Thread Direction: right-hand 1st end
Flow Control Device: poppet
Connection Style: external seat for gasket seal (boss) 1st end
Valve Operation Method: manual
Connection Type: threaded external boss 1st end
Thread Quantity Per Inch: 18 1st end
Maximum Operating Pressure: 3000.0 pounds per square inch 1st response
Nominal Thread Size: 0.562 inches 1st end
Nominal Outside Diameter Tube Accommodated: 0.375 inches 1st end
Material: aluminum alloy body
Style Designator: straight thru
Thread Series Designator: unf 1st end

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
1650-00-621-3449	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
238624	Poppet Drain Cock
238625	Poppet Drain Cock

FAQs

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

What is the FSCG of the NSN 4820-00-521-5994?

The FSCG of the NSN 4820-00-521-5994 is 4820

Does the NSN 4820-00-521-5994 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-521-5994 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 4820-00-521-5994 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-521-5994 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 4820-00-521-5994 was assigned to the Federal Catalog?

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