jim rozen wrote:
In article .com, John2005
says...


The load tends to deform, pry or bend the threads out of the support.


You need to determine which one of those failure modes is happening.

If you cannot change the design to put a larger diameter where the
part mates to the vertical surface, then get rid of the turned
down section. Thread the part 3/8-24.

Jim


Now that's a good idea. Extending the thread way past what is needed
will move the stress concentration of the last tread out to a lower
stressed area and loctite will hold it in.