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Re: Thread shear

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>what length of thread is required to develop the full tension of a grade 5
>bolt (3/8" diam specifically).
As a rule of thumb, heavy hex nuts are long enough to force failure to 
take place in the bolt shank, not by stripping. If you're tapping into 
low strength steel instead of using a nut, simply proportion the 
available strength to the length of thread less two thread pitches, since 
the end threads are usually imperfect.

Christopher Wright P.E.    |"They couldn't hit an elephant from
chrisw(--nospam--at)skypoint.com        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)
http://www.skypoint.com/~chrisw