ST7M398

View detailed technical data, stock status, and sourcing information for: ST7M398
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-045-8708

Item Name Code

05487

Assigment Date

08/09/1977 (48 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.

disk flow control device, spring disk loading method, 3b 2nd end thread class, right-hand all ends thread direction, 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: 3a 1st end
Thread Class: 3b 2nd end
Thread Direction: right-hand all ends
Flow Control Device: disk
Disk Loading Method: spring
Maximum Operating Temp: 300.0 fahrenheit single response
Connection Style: flared (tube) 1st end
Connection Style: gasket seal (boss) 2nd end
Valve Operation Method: automatic
Connection Type: threaded external tube 1st end
Connection Type: threaded internal boss 2nd end
Mounting Position: horizontal or vertical
Thread Quantity Per Inch: 18 all ends
Maximum Operating Pressure: 60.0 pounds per square inch single response
Nominal Thread Size: 0.563 inches all ends
Seat Angle: 37.0 degrees 1st end
Special Features: inlet flow from boss end
Material: aluminum alloy body
Material: aluminum alloy flow control device
Material: rubber synthetic seat
Material Document And Classification: qq-a-225/6 fed spec single material response body
Material Document And Classification: qq-a-225/6 fed spec single material response flow control device
Media For Which Designed: fuel/oil, hydrocarbon single response
Surface Treatment: anodize
Surface Treatment Document And Classification: mil-a-8625,type 2 mil spec single treatment response
Style Designator: straight thru
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
2S2596	Check Valve
P71-533	Check Valve
ST7M398	Check Valve
ST7M398-1	Check Valve
ZE2CV06-1	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-01-045-8708?

The FSCG of the NSN 4820-01-045-8708 is 4820

Does the NSN 4820-01-045-8708 have a Schedule B code assigned?

Yes, the Schedule B code is 8481309000

Does NSN 4820-01-045-8708 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 4820-01-045-8708 contain precious materials?

Precious metal content is unknown

Does NSN 4820-01-045-8708 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 4820-01-045-8708 was assigned to the Federal Catalog?

It was assigned 48 years ago, on Tue, Aug 9, 1977