ST7M398-1

View detailed technical data, stock status, and sourcing information for: ST7M398-1
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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, 3a 1st end 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 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