Spiralock’s new self-locking threaded fasteners enhance reliability by combating vibration, thread loosening, and extreme temperatures, while easing assembly, maintenance, and inventory management without the need for secondary locking features.

The thread form adds a 30-degree wedge ramp at the root of the thread that joins standard 60-degree thread fasteners. The wedge ramp allows the bolt to spin freely relative to the threads until tension is created in the fastener. The crests of the standard thread form are drawn tightly against the wedge ramp, eliminating radial clearances and creating a continuous spiral line contact along the entire length of the thread engagement. This continuous line contact improves resistance to vibrational loosening, axial-torsional loading, joint fatigue, and temperature extremes.
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