Our Technology
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What is Spiralock®?Spiralock Corporation has transformed the standard internal thread profile into a self-locking female thread form with the addition of a unique 30° wedge ramp at the root of the thread. This unidirectional locking feature, called Spiralock®, is compatible with standard 60° male thread fasteners. The wedge ramp allows male fasteners to spin freely relative to the female threads until clamp load is applied. At that point, the crest of the standard male threads is drawn tightly against the wedge ramp, creating a continuous spiral line of contact along the entire length of the thread engagement. As clamp load increases, the wedge ramp pushes against the male thread from all sides, eliminating the radial clearance that allows fasteners to begin self-loosening under vibration.
Why use Spiralock thread form?
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