Before revision: A major part of the torque is due to friction, so the differences in friction can cause large variations of the preload ; angle-controlled tightening (also known as turn-of-the-nut method) is a technique where the bolt joint is rotated to some angle that ensures the stress beyond the yield limit of the parts.
After revision: with the same torque settingA major part of the torque is due to friction, so the differences in friction can cause large variations of the preload ; angle-controlled tightening (also known as turn-of-the-nut method) is a technique where the bolt joint is rotated to some angle that ensures the stress beyond the yield limit of the parts.