645B5-6T

View detailed technical data, stock status, and sourcing information for: 645B5-6T
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-059-4933

Item Name Code

05488

Assigment Date

06/15/1967 (59 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.

2b all ends thread class, poppet flow control device, spring disk loading method, 400.0 fahrenheit single response maximum operating temp, right-hand all ends thread direction

Product Characteristics

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

Thread Class: 2b all ends
Thread Direction: right-hand all ends
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: 400.0 fahrenheit single response
Connection Style: gasket seal(boss) all ends
Valve Operation Method: manual
Connection Type: threaded internal boss all ends
Features Provided: pressure tight outlet side
Adjustable Pressure Range: +235.0 to 450.0 pounds per square inch
Maximum Operating Pressure: 2200.0 pounds per square inch single response
Nominal Thread Size: 0.562 inches all ends
Opening Pressure Setting: 360.0 pounds per square inch
Nominal Outside Diameter Tube Accommodated: 0.375 inches all ends
Material: plastic polytetrafluoroethylene flow control device
Material: steel corrosion resisting body
Material: steel corrosion resisting seat
Media For Which Designed: water-oil-gas single response
Surface Treatment: passivate
Style Designator: angle
Thread Series Designator: unjf 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
645B-5-6-T	Safety Relief Valve
645B5-6T	Safety Relief Valve

FAQs

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

What is the FSCG of the NSN 4820-00-059-4933?

The FSCG of the NSN 4820-00-059-4933 is 4820

Does the NSN 4820-00-059-4933 have a Schedule B code assigned?

Yes, the Schedule B code is 8481400000

Does NSN 4820-00-059-4933 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 4820-00-059-4933 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-059-4933 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 4820-00-059-4933 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Thu, Jun 15, 1967