Quote:


RR, 1 1/4 D is very safe, it might be interesting to you to know that bolts will develop their whole strength with two full threads engaged in the nut.

R.



Two threads? No, thread engagement has to at least equal the diameter for full strength. 1/4-20 bolt needs a 1/4" thread engagement, as an example.

http://www.fastenal.com/content/feds/pdf/Article%20-%20Screw%20Threads%20Design.pdf

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.