Stanley Spiralock Fasteners

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Stanley Spiralock Fasteners

Technologically-superior fastening system ideally suited for threaded joint applications subjected to heavy vibration and challenging environments.

An effective, proven and reliable solution to prevent threaded joint loosening problems. Spiralock’s wedge ramp allows male fasteners to spin freely, relative to the female thread 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 the 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.