The most secure fastening solution for extreme vibration environments.

Hard Lock Nuts resist loosening from vibration longer than any other fastener or locking nut on the market. New to the U.S. market, and a leading choice for engineers in Japan, the United Kingdom and Europe, the Hard Lock Nut uses a unique wedge principle to create an unprecedented and powerful self-locking force. Hard Lock Nuts have been proven successful for more than a decade, and in many industries, including railways, civil engineering, telephone, radar and power masts, towers and pylons, wind turbines towers and more. The extremely secure connection enhances safety and reduces maintenance and inspection costs.

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