Seems there has been a lot of atties that are not threading properly. The connectors I use are OEM and are very tight tolerance. I have talked to a lot of SB owners who have had thier SB for months now and they have also ran into this issue as well. I belive the hurried production before and after the Chineese holiday is the culprit. When you screw and unscrew the faulty atties you are recutting the threads on the atty. Do not force the faulty atty into the threads. Screwing them in and out a little at a time should do the trick. If you do use noalox to aide in this process be sure to clean it off very good with a q-tip. I am uncertain what the alcohol will do to the insulator, so use it sparingly. I have yet come accross any of these bad atties but i do have one comming to me this week. I suspect the thread pitch is off slightly. My advice is to use the atty that fits first and screw and unscrew it several times to give the connector some "slop"