The conical nut was fused to the stud and every speck of it had to be cut / hammered off. I had to cut the spacer enough to pull the pieces out the side, the pics show a bent cold chisel and sawzall blade, I also used a dremel with a titanium bit and a 4" grinder with a cutoff wheel. The best pic is the middle finger of my left hand. No worries, the BFH is fine.