Putting the nut on the end of the bolt may be a part of your issue. When you torque the nut you are partially unloading the tension of the bolt on the threads of the eyelet. I believe that this may lead to the bolt moving around inside of the eyelet threads where it may not have, if torqued against the eyelet normally. If you need a nut on the end I believe that the suggestions to drill out the eyelet threads may be sound advice.