Quote:
Originally Posted by ROLLGUY
Are we talking the bolt or the threads in the aluminum? I am sure the threads in the aluminum will give out before the bolt will break. Also, are both heads the same thickness? If the new head is thicker, longer bolts will be needed. A short bolt ( only a few threads in the aluminum) will surely pull a few threads out.
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In aluminum, the numbers are significantly less. In fact, I'd guess they are 1/2 the figures that I quoted above. Aluminum can't take any torque and, typically, the screw isn't of sufficient length (1.5 x diameter in the threaded length) to even make the table values.