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Knowledge about brass fittings thread

April 24, 2018

Thread is the important part of brass fitting

It Provide mechanical support and seal

Every thread have some very import information:Crest ,Root,Flank Angle,Pitch,Outside diameter.


Pitch:The distance between the thread like Crest to Crest,Root to Root.

And pitch have different writing method:metric thread, inch thread.common fitting’s

 

Metric thread pitch:1.0mm、1.5mm、2.0mm

 

 

 

 

 

Common fitting’s inch thread pitch:11、14、18、20


 

 

When the thread is Tapered thread. It also have taper angle.


Outside diameter: outside diameter(crest-crest)

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