4820-01-148-6939

Find complete technical information, availability, and procurement data for: 4820-01-148-6939
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-148-6939

Item Name Code

05488

Assigment Date

03/09/1983 (43 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.

3a all ends thread class, poppet flow control device, inside screw bonnet type, right-hand all ends thread direction, threaded bonnet attachment method

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
Flow Control Device: poppet
Bonnet Type: inside screw
Bonnet Attachment Method: threaded
Connection Style: flared (tube) all ends
Valve Operation Method: automatic
Connection Type: threaded external tube all ends
Adjustable Pressure Range: +0.0 to 3000.0 pounds per square inch
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.500 inches all ends
Seat Angle: 37.0 degrees all ends
Special Features: with sintered breather
Material: steel corrosion resisting overall
Media For Which Designed: oil, hydraulic single response
Style Designator: straight thru
Thread Series Designator: unf 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
895-28365 ITEM 32	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-01-148-6939?

The FSCG of the NSN 4820-01-148-6939 is 4820

Does the NSN 4820-01-148-6939 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-01-148-6939 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 4820-01-148-6939 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-148-6939 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 4820-01-148-6939 was assigned to the Federal Catalog?

It was assigned 43 years ago, on Wed, Mar 9, 1983