This cluster of papers focuses on the analysis, modeling, and experimental study of bolted joints, threaded fasteners, and gasketed joints. It explores topics such as finite element analysis of tightening and loosening mechanisms, friction coefficients in torque-preloading relationships, bearing friction torque, and the effect of thread pitch on fatigue life. The papers also investigate the behavior of bolted joints under various loading conditions, the influence of lubrication on frictional characteristics, and methods to prevent self-loosening and improve anti-loosening performance.