402040

View detailed technical data, stock status, and sourcing information for: 402040
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-142-1382

Item Name Code

05488

Assigment Date

01/01/1963 (63 years ago)

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes:valve (1), relief, pressure and temperature.

threaded bonnet attachment method, 0.500 inches 1st end nominal pipe size accommodated, right-hand 1st end thread direction, disk flow control device, inside spring bonnet type

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: 0.500 inches 1st end
Thread Direction: right-hand 1st end
Flow Control Device: disk
Bonnet Type: inside spring
Bonnet Attachment Method: threaded
Disk Loading Method: spring
Renewable Seat Ring Type: threaded
Bolt Hole Quantity: 3 2nd end
Maximum Operating Temp: 125.0 fahrenheit single response
Connection Style: plain,optional end(pipe) 1st end
Valve Operation Method: manual
Flange Shape: round with holes 2nd end
Connection Type: flange 2nd end
Connection Type: threaded internal pipe 1st end
Features Provided: valve stem lock shield and pressure tight outlet side
Adjustable Pressure Range: +20.0 to 70.0 pounds per square inch
Maximum Operating Pressure: 60.0 pounds per square inch single response
Nominal Thread Size: 0.500 inches 1st end
Nominal Outside Diameter: 3.562 inches 2nd end
Nominal Thickness: 0.312 inches 2nd end
First Connection Face To Centerline Distance: 1.500 inches
Bolt Hole Nominal Diameter: 0.562 inches 2nd end
Second Connection Face To Centerline Distance: 1.500 inches
Bolt Circle Nominal Diameter: 2.438 inches 2nd end
Flange Face Design: plain 2nd end
Material: copper alloy body
Material: copper alloy flow control device
Material: copper alloy stem
Material: nickel alloy seat
Media For Which Designed: water, fresh single response
Style Designator: angle flanged ends
Thread Series Designator: npt 1st end

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
402040	Safety Relief Valve
595-50FS1-2	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-142-1382?

The FSCG of the NSN 4820-00-142-1382 is 4820

Does the NSN 4820-00-142-1382 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-142-1382 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 4820-00-142-1382 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-142-1382 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 4820-00-142-1382 was assigned to the Federal Catalog?

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