MS28771-8SS

View detailed technical data, stock status, and sourcing information for: MS28771-8SS
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-345-3817

Item Name Code

05487

Assigment Date

09/18/1991 (34 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.

250.0 fahrenheit single response maximum operating temp, spring disk loading method, disk flow control device, 3a all ends thread class, 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: 3a all ends
Thread Direction: right-hand all ends
Flow Control Device: disk
Disk Loading Method: spring
Maximum Operating Temp: 250.0 fahrenheit single response
Connection Style: external seat for gasket seal (boss) all ends
Valve Operation Method: automatic
Connection Type: threaded external boss all ends
Mounting Position: horizontal
Thread Quantity Per Inch: 16 all ends
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.750 inches all ends
Seat Angle: 37.0 degrees all ends
Material: steel comp 304 body
Media For Which Designed: oil, hydraulic single response
Style Designator: straight thru
Thread Series Designator: unj 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
83693	Check Valve
MS28771-8SS	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-345-3817?

The FSCG of the NSN 4820-01-345-3817 is 4820

Does the NSN 4820-01-345-3817 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-01-345-3817 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 4820-01-345-3817 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-345-3817 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 4820-01-345-3817 was assigned to the Federal Catalog?

It was assigned 34 years ago, on Wed, Sep 18, 1991