exhaust pressure sensing tube

[Konstantin]

Hi guys, I am changing exhaust manifold gaskets and run into a problem. I was not able to unscrew exhaust pressure sensing tube from both manifold and exhaust pressure sensing housing. After heating tube unscrewed from the housing but not from manifold. I left it hanging there. So , I changed gaskets, bolts , etc and now I think I have damaged threads in the housing. Anybody knows what to do? Maybe you know what kind of thread it is? I do not know for sure but it looks to me metric M12 1.0 . Thanks!