4820-00-540-2740

Find complete technical information, availability, and procurement data for: 4820-00-540-2740
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-540-2740

Item Name Code

20520

Assigment Date

01/01/1963 (63 years ago)

right-hand all ends thread direction, 3a all ends thread class, spring disk loading method, poppet flow control device, 0.040 inches nominal aperture diameter

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 all ends
Thread Direction: right-hand all ends
Aperture Diameter: 0.040 inches nominal
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: 160.0 fahrenheit single response
Connection Style: flared (tube) all ends
Valve Operation Method: automatic
Connection Type: threaded external tube all ends
Mounting Position: horizontal or vertical
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.875 inches all ends
Seat Angle: 37.0 degrees all ends
Material: aluminum alloy body
Material: rubber synthetic packing
Material: steel corrosion resisting flow control device
Style Designator: straight thru
Thread Series Designator: unf all ends

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
4730-00-562-8343	No Name Available	09/27/1972

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
1112-548584	Restrictor Check Valve
47305402740	Restrictor Check Valve
48205402740	Restrictor Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-540-2740?

The FSCG of the NSN 4820-00-540-2740 is 4820

Does the NSN 4820-00-540-2740 have a Schedule B code assigned?

Yes, the Schedule B code is 8481309000

Does NSN 4820-00-540-2740 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 4820-00-540-2740 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-540-2740 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 4820-00-540-2740 was assigned to the Federal Catalog?

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