Originally Posted by
oddjob2
You are correct. I sheared a grade 2 bolt going counterclockwise on the outside with my breaker bar socket and upgraded to a grade 5 bolt. I've also applied some heat. It has been PB blasted long enough to try from the loose cup side to see if it is lefty loosey.
I think that method broke up the inside of the other cup.
I think the machined grooves in the Stronglight cup reveal the thread type, my early Sutherland's is not at hand to reference though.