493-8B2-5

View detailed technical data, stock status, and sourcing information for: 493-8B2-5
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-006-3988

Item Name Code

05487

Assigment Date

06/23/1972 (54 years ago)

A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

poppet flow control device, 225.0 fahrenheit single response maximum operating temp, 3b all ends thread class, spring disk loading method, 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: 3b all ends
Thread Direction: right-hand all ends
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: 225.0 fahrenheit single response
Connection Style: gasket seal (boss) all ends
Valve Operation Method: automatic
Connection Type: threaded internal 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
Nominal Outside Diameter Tube Accommodated: 0.500 inches all ends
Material: copper alloy body
Material: rubber seat
Material: steel comp 304 and steel comp 303 flow control device
Material Document And Classification: mil-g-1149,type 2 class 5 mil spec single material response seat
Material Document And Classification: qq-b-626,alloy 360 fed spec single material response body
Media For Which Designed: air 1st response
Media For Which Designed: fuel/oil, hydrocarbon 2nd 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
493-8B2-5	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-006-3988?

The FSCG of the NSN 4820-00-006-3988 is 4820

Does the NSN 4820-00-006-3988 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-00-006-3988 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 4820-00-006-3988 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-006-3988 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 4820-00-006-3988 was assigned to the Federal Catalog?

It was assigned 54 years ago, on Fri, Jun 23, 1972