Jerry
I agree..if it states to use oil then you must use oil, to achieve the preload required, which I referred to as "wet torque" in my post.
I apologize. I did not research any manuals to establish if these bolts were to be wet or dry.
It all depends on the application and fastener coating, if any, to fall in to where you want to be for the clamping load.
I was only trying to close in on what could cause this bolt to fail.
