I have a bolt without any friction information.
T=FDK
D=0.008m
Tmax=20Nm
K= ??? unknow friction factor
It was tested and Tavg(old)=2Nm.
The same bolt was coated and the friction has increased.
It was tested and Tavg(new)=9.8Nm
I know the relation 4.65Tavg(old)=Tavg(new)
If both bolt was...