What is the angle of taper on BSPT Male Thread?

[vagulus]

What is the angle 'alpha' shown here?

As a point of interest, why is it not shown in all thread diagrams of BSPT Male Thread?

Thanks


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Artificial Intelligence is no match for Natural Stupidity

 

[xnuke]

A quick Google search reveals a taper of 3/4" per foot, or 1:16, which means the angle is 3.576 degrees.

xnuke
"Live and act within the limit of your knowledge and keep expanding it to the limit of your life." Ayn Rand, Atlas Shrugged.
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[vagulus]

Thanks xnuke.
I don't know what you searched for but my search wasn't quick and I didn't find either the angle or the slope (1:16).
Must be losing my grip

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Artificial Intelligence is no match for Natural Stupidity