Seismic isolation systems protect buildings by absorbing and deflecting earthquake energy before it reaches the structure. This is achieved by placing isolators and dampers—often fitted with anti-vibration rubber—between the building and its foundation. These components require secure but non-rigid fastening, which presents unique challenges for traditional nuts and bolts.

HARDLOCK Nut offers a solution that enables safe, effective fastening even in installations where strong tightening is not possible, ensuring the performance and reliability of seismic isolation systems during critical events.

Installing seismic isolation systems introduces several fastening difficulties:

• Soft Surfaces: Anti-vibration rubber prevents strong torque from being applied, making secure fastening difficult.
• Traditional Double Nuts: Often used in the past, double nut methods are complex and prone to loosening in vibration-prone environments.
• Difficult Installation: Securing components in tight or delicate spaces increases labor time and risk of incorrect installation.
• Maintenance Burden: Loosening over time increases the need for inspections and retightening, especially after seismic events.

These challenges affect both safety and project efficiency, particularly in high-stakes construction like hospitals, data centers, and high-rise buildings.

HARDLOCK Nut’s self-locking wedge mechanism provides secure fastening without the need for high torque or secondary nuts:

• Secure Fastening on Soft Materials: Performs reliably even on anti-vibration rubber, where standard nuts cannot be fully tightened.
• Simplified Installation: Eliminates the need for time-consuming double nutting, making installation faster and more consistent.
• Non-Loosening Design: Maintains clamping force over time, resisting loosening caused by long-term vibration and seismic motion.
• Versatile Application: Ideal for components with installation constraints or limited torque requirements.
• Lower Costs: Reduces both initial labor time and long-term maintenance costs.

By enabling proper fastening without over-tightening, HARDLOCK Nut enhances the reliability of seismic isolation installations. It reduces shaking during earthquakes while eliminating the drawbacks of double nutting and high-maintenance fastening methods. Trusted by engineers and builders, HARDLOCK ensures that seismic isolators perform at their best—when it matters most.