Quote:
Originally Posted by SouthArk370Z
This may or may not help in your research but bolt torque is an indirect measure of bolt stretch.
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When I worked at Elliott TurboMinchinery. On some applications, we measured bolt/stud stretch. On others. We installed the nuts hand tight. Then heated up the bolt/stud up. Then turned the nut so many flats to set the torque. We also used a HydroTorque wrench. Which is a hydraulic wrench. You set the torque by how much hydraulic pressure you have at the head.