4820-00-254-8640

Find complete technical information, availability, and procurement data for: 4820-00-254-8640
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-254-8640

Item Name Code

16990

Assigment Date

01/01/1963 (63 years ago)

A compact two-way type of valve mechanism having a one piece body and seat and a one piece stem and disk. It has no bonnet, and is not used for fine control of flow. It is used extensively in the automotive field.

0.125 inches 2nd end nominal pipe size accommodated, right-hand 2nd end thread direction, 3a 1st end thread class, disk or stem flow control device, right-hand 1st end thread direction

Product Characteristics

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

Nominal Pipe Size Accommodated: 0.125 inches 2nd end
Thread Class: 3a 1st end
Thread Direction: right-hand 1st end
Thread Direction: right-hand 2nd end
Flow Control Device: disk or stem
Connection Style: flared (tube) 1st end
Connection Style: plain (pipe) 2nd end
Valve Operation Method: manual
Connection Type: threaded external pipe 2nd end
Connection Type: threaded external tube 1st end
Nominal Thread Size: 0.125 inches 2nd end
Nominal Thread Size: 0.437 inches 1st end
Seat Angle: 45.0 degrees 1st end
Nominal Outside Diameter Tube Accommodated: 0.250 inches 1st end
Material: copper alloy overall
Style Designator: straight thru
Thread Series Designator: npt 2nd end
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Below is a list of NSNs that have been officially superseded by this NSN: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
4820-00-329-8071	No Name Available	01/01/1963
4820-00-384-0295	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
131-50530	Screw Stem Shutoff Cock
530 1/4IN	Screw Stem Shutoff Cock

FAQs

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

What is the FSCG of the NSN 4820-00-254-8640?

The FSCG of the NSN 4820-00-254-8640 is 4820

Does the NSN 4820-00-254-8640 have a Schedule B code assigned?

Yes, the Schedule B code is 8481909090

Does NSN 4820-00-254-8640 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 4820-00-254-8640 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-254-8640 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 4820-00-254-8640 was assigned to the Federal Catalog?

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