The French conical knurled anti-loosening gasket relies on the interlocking of conical surfaces for locking. It is suitable for the strong vibration and alternating load scenarios of high-speed rail and is widely used in the fasteners of car bodies, bogies, and electrical cabinets. It is resistant to temperature differences and fatigue, stabilizes the pre-tightening force of bolts, effectively resisting the risk of loosening caused by train vibration, and ensuring the safe and reliable connection of rail vehicles.