Normally conventional right hand threads, just be careful if using the
propane heat method with resulting possible seal damage,
Prior to the
heating method i usually give the
head of the bolt several well placed wacks with a suitable heavy hammer and that does the job, as you know now using adjustable wrench's are a complete waste of time (and in my book a waste of space!!)
As previous threads the ONLY way to go is with a
good quality multi point socket , 6 point sockets may
work if seriously good quality but tend to slip off and with your damaged nut dont think you will have much success, where as the multi point socket looks like may find some un damaged portion of the nut,
What I'm going to tell you next you didn't hear from me and i dont recommend it at all BUT I have seen this
work: secure the bolt by what ever means you have left as a viable option secure against the
engine bed and flick the starter (either you will have the bolt loose or a hole some where through the surrounding walls where the tool slipped off! ) (
hence why i dont recommend it!) , but some times in a cruising situation there's no easy alternative.
After the nut is completely un usable a nice sized metal chisel and good sized hammer will do the job, if accessible/available the other option is to weld another suitable sized nut to the damaged one, the heat from the welding will help with the extraction,
Cheers Steve