With the angle less than 60° and the bolt is in a counter bore I can't see the loads needed to shear the 3/8" 2024 T3 Aluminum with a shock load from a tie down rope.
Also my aircraft is in a hanger 90% of the time.
I feel comfortable with this design.
Originally Posted by EXflyer
So still no radius at the end of the threads and the threads are still sharp in the root. Every one on here worries about stress risers in scratches which are the same. Not putting down your design just saying that its a stress point when side loaded.