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How It All Began In December 1915, Edward A. Green invented the “nut and retainer.” A few years later, he patented the “nut lock,” paving the way for what is now known as the Security Locknut. This unique locking nut was said

The relationship between input torque and tension is the governing principle behind a well-designed bolted joint. Often, calculated values are not reciprocated in field applications. To determine the tension (also known as preload, clamp force, or clamp load), a Skidmore-Wilhelm