Stop in for a cup of coffee

I ran a tap down thru the bolt holes and blew it out with the air gun. Twice. No I think it was a combination of the torque wrench not being accurate and me not quite having the feel for such low torque. I hung 35 pounds of known weight in 5 pound increments off the handle of the torque wrench before it finally clicked. With it set at 45 inch pounds.

I’ll get pics later this morning. The one just sheered in half, which actually is a good thing cause I wouldn’t have noticed that the other one had stretched and bent
Stretched !????

Looking at the rockwell and iyild for a 12.9 I would expect they would snap or shear.
Would need to look up the full specs to see if it was annealed as well as the yield verses ultimate strength.
I haven't ha d to deal much with metric stuff so just going with the book stuff here