Tim Dietl

Hello Peter, thanks for your answer.

When the red face ends, thats the point wher the threads on the shank touch the threads in the hole.

First step: bolt pretension

second: working load ( 5,5MPa Pressure)

Here it says adjustment reaction: 0,1736mm. 

And deformation = FL/AE = 48458N*42mm/(2*10^5MPa*PI/4*12^2) = 0,089977mm

I am confused?