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Old 11-03-2009, 07:31 PM   #46
SnowAviation
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Default Re: Subframe bolt upgrade

Quote:
Originally Posted by ttpete View Post
I notice this doesn't seem to have created ANY interest. So, I'm going to say it again, only louder:

DO NOT EVER HAVE THE THREADED PORTION OF A BOLT IN A SHEAR PLANE WHERE IT HAS TO BEAR A LOAD. NEVER.

The notch formed by the thread is a stress riser, and a crack WILL propagate from that point. This is why aircraft (AN) bolts are available in 1/16" increments of length, and have just enough thread length to support a nut.

Buy a bolt long enough that the solid shank extends through both shear planes and cut some of the threaded part off to get the correct length. Or just use a proper AN bolt.
Your white text and sensible advice have piqued my interest. I hear you.
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