Originally Posted by
TDKn
Alright, I'll have a LBS take a look at it as I don't have any steel bottom brackets lying around. Thanks for the advice about greasing it, I did actually put a thin layer of some waterproof auto grease stuff I had out in my garage on the threads before I tried to thread it in. Is that ok to use, grease is grease, right?
The grease you have is fine. Only those expecting to leave assemblies together for long periods (years) need worry about upgrading to an anti-seize.
Your problem is that there was probably some residue of the old cup filling the threads, leaving no room for the new cup. The result is that those threads were crushed too. It's also possible that there was a burr or distorted thread in the shell which is what did in the first cup. In any case tapping it clean will resolve the problem.