How does Hex Conical Washer Nuts achieve the dual effects of anti-loosening and pressure dispersion?

In the field of mechanical fastening, Hex Conical Washer Nuts has become a key technology for solving bolt loosening and stress concentration due to its unique structural design. Its core advantage lies in the simultaneous realization of anti-loosening performance and pressure dispersion through the innovation of physical structure, which is especially suitable for industrial scenarios with high vibration and dynamic loads.
Synergy of conical washers and hexagonal nuts
Hex Conical Washer Nuts consists of a hexagonal nut and an integrally formed conical washer. The inner side of the conical washer is usually designed as a beveled tooth surface, and the outer side has radial convex patterns. When the nut is tightened, the conical washer contacts the connection surface, and the beveled tooth surface generates radial tension due to pressure, forcing the nut to tightly engage with the bolt thread to form a self-locking effect. At the same time, the outer convex pattern engages with the contact surface to further resist rotational loosening caused by vibration.
Pressure dispersion: transformation from point load to surface load
The contact surface of traditional nuts is concentrated on the hexagonal edge, which can easily lead to excessive local stress and accelerate fatigue cracking of concrete or metal substrates. The conical washers of Hex Conical Washer Nuts transfer the load evenly to the substrate surface by expanding the contact area. For example, in bridge steel structures, the conical design can expand the stress distribution range by 30%-50%, significantly reducing the risk of micro cracks at the edges of bolt holes.
Dual protection mechanism under dynamic load
Anti-vibration and anti-loosening: When the equipment is running, vibration will cause ordinary nuts to gradually loosen due to the decrease in friction coefficient. The beveled tooth surface of Hex Conical Washer Nuts will generate reverse lifting force during vibration, forcing the nut to reset. Experiments show that its anti-loosening performance is more than 40% higher than that of Nylon Insert Lock Nuts.
Temperature adaptability: The elastic deformation ability of the conical washer can compensate for the loss of preload caused by thermal expansion and contraction of the material. For example, in an environment of -30℃ to 150℃, its residual preload can still maintain more than 85% of the initial value.