Understanding the concept of Pretension in bolts and nuts and the 'Torque To Yield' or Angle Controlled Tightening' in engineering applications. The practice of tightening bolts/nuts to a specific torque value followed by an additional angle (e.g., 90° to 180°) is known as "torque-to-yield" (TTY) or "angle-controlled tightening." This method is used for critical engine components where precise clamping force is crucial. Applications TTY is commonly used in critical engine applications, such as:
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