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Worldwide distributor of NSN parts and consumables located in the USA.

Check Valve

Model / MPN: 493-12B2-5 | NSN: 4820-00-005-4903
ITAR Registered seal

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.

Product Details
NATO Stock Number
4820-00-005-4903
Sold in multiples of
1 EA
DEMIL
NO
Thread Class
3a all ends
Thread Direction
Right-hand all ends
Flow Control Device
Poppet
Disk Loading Method
Spring
Maximum Operating Temp
-65.0 degrees fahrenheit 2nd response
Maximum Operating Temp
225.0 degrees fahrenheit 1st response
Connection Style
Gasket seal (boss) all ends
Valve Operation Method
Automatic
Connection Type
Threaded internal boss all ends
Mounting Position
Horizontal
Maximum Operating Pressure
3000.0 pounds per square inch single response
Thread Size
1.062 inches all ends
Outside Diameter Tube Accommodated
0.750 inches all ends
Material
Copper alloy 360 body or copper alloy body
Material
Rubber synthetic packing or rubber packing
Material
Rubber synthetic seat
Material
Steel comp 303 flow control device and steel comp 304 flow control device
Material Specification
66, aisi 303/sae 30303 federal standard 1st material response flow control device and 66, aisi 304/sae 30304 federal standard 2nd material response flow control device
Material Specification
Mil-g-1149 military specification single material response seat
Material Specification
Qq-c-676 military specification 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

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493-12B2-5 Cross Reference
  • 493-12B2-5