This final picture gives you a good view of the insulator pieces remaining on the two pins on the crossarm. The pin on the right clearly has the top of the bottom skirt still on it, and no sign of threads. The one on the left has a shell of the second skirt and the top of the bottom skirt. It would be interesting to see if any broken pieces remain at the bottom of the pole. The first photo is here [id=504922245].