493-12B2-5

View detailed technical data, stock status, and sourcing information for: 493-12B2-5
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-005-4903

Item Name Code

05487

Assigment Date

06/19/1972 (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.

Maximum Operating Temp: -65 degree fahrenheit 2nd response, Nominal Outside Diameter Tube Accommodated: 0.75"

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Material Document and Classification: 66,aisi 303/sae 30303 fed std 1st material response flow control device and 66,aisi 304/sae 30304 fed std 2nd material response flow control device
Material: Rubber synthetic seat
Material: Rubber synthetic packing or rubber packing
Material: Steel comp 303 flow control device and steel comp 304 flow control device
Special Features: Valve cracking pressure 5 psi
Material: Copper alloy 360 body or copper alloy body
Nominal Outside Diameter Tube Accommodated: 0.75 inches all ends
Nominal Thread Size: 1.062 inches all ends
Valve Operation Method: Automatic
Connection Style: Gasket seal (boss) all ends
Mounting Position: Horizontal
Maximum Operating Pressure: 3000 pounds per square inch single response
Maximum Operating Temp: 225 degree fahrenheit 1st response
Disk Loading Method: Spring
Connection Type: Threaded internal boss all ends
Maximum Operating Temp: -65 degree fahrenheit 2nd response
Thread Direction: Right-hand all ends
Flow Control Device: Poppet
Thread Class: 3a all ends
Material Document and Classification: Mil-g-1149 mil spec single material response seat
Media For Which Designed: Fuel/oil, hydrocarbon 2nd response
Style Designator: Straight through
Material Document and Classification: Qq-c-676 mil spec single material response body
Media For Which Designed: Air 1st response
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
493-12B2-5	Check Valve

FAQs

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

What is the FSCG of the NSN 4820-00-005-4903?

The FSCG of the NSN 4820-00-005-4903 is 4820

Does the NSN 4820-00-005-4903 have a Schedule B code assigned?

Yes, the Schedule B code is 8481301090

Does NSN 4820-00-005-4903 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 4820-00-005-4903 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-00-005-4903 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 4820-00-005-4903 was assigned to the Federal Catalog?

It was assigned 54 years ago, on Mon, Jun 19, 1972