859T1-4TJ

View detailed technical data, stock status, and sourcing information for: 859T1-4TJ
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-365-6958

Item Name Code

05487

Assigment Date

10/11/1992 (33 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.

275.0 fahrenheit single response maximum operating temp, 2b 2nd end thread class, right-hand all ends thread direction, poppet flow control device, 3a 1st end thread class

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 2nd end
Thread Class: 3a 1st end
Thread Direction: right-hand all ends
Flow Control Device: poppet
Maximum Operating Temp: 275.0 fahrenheit single response
Connection Style: external seat for gasket seal (boss) 1st end
Connection Style: gasket seal (boss) 2nd end
Valve Operation Method: automatic
Connection Type: threaded external boss 1st end
Connection Type: threaded internal boss 2nd end
Mounting Position: horizontal or vertical
Maximum Operating Pressure: 600.0 pounds per square inch single response
Nominal Thread Size: 0.438 inches all ends
Seat Angle: 37.0 degrees 1st end
Material: steel comp 316 body
Media For Which Designed: acetylene 2nd response
Media For Which Designed: air 1st response
Media For Which Designed: carbon dioxide 3rd response
Media For Which Designed: helium 4th response
Media For Which Designed: hydraulic fluid, mineral base 5th 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
859T1-4TJ	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-365-6958?

The FSCG of the NSN 4820-01-365-6958 is 4820

Does the NSN 4820-01-365-6958 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-01-365-6958 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 4820-01-365-6958 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-365-6958 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 4820-01-365-6958 was assigned to the Federal Catalog?

It was assigned 33 years ago, on Sun, Oct 11, 1992