Self-locking, micro threaded inserts are vibration resistant

The micro threaded inserts also improve fastener reusability and reduce overall assembly costs by eliminating the need for nylon patch or chemical adhesive application on screw threads.

The Spiralock thread form solves thread loosening and joint integrity issues by changing the physics of how the threads interact. In traditional 60° threads, the gap between the crests of the screw/bolt and the major diameter of the internal thread is where loosening begins.

With significant transverse motion, thermal variance, shock or impact, microscopic movements and preload loss occur in the fastener’s threads.  This tiny clearance gap allows the bolt to minimally “slip” relative to the major diameter of the female threaded hole. 

Once preload loss begins, the joint will fail and lose most of its clamp load during service. Furthermore, with standard threads, most of the load is carried by the first few threads, where stress concentration and fatigue can lead to premature joint failure. 

The Spiralock self-locking wedge ramp thread profile eliminates the clearance gap, locking the male fastener in place. The Spiralock wedge ramp creates line contact with the screw/bolt along the entire length of thread engagement, preventing any movement between the screw/bolt and Spiralock wedge locking ramp.

Since Spiralock is free running and begins to lock once torque is applied, tension is created between the male fastener and the Spiralock threads. This enables quick, smooth bolt rundown with minimal drag or resistance when threading components.  It also reduces assembly cost, time, as well as extends thread lock reusability and product longevity.

The Spiralock micro threaded inserts can be installed into many types materials such as plastic components, steel chassis, and other materials that normally would utilise the conventional micro threaded inserts while using a patch screw as the means for locking.
Spiralock micro threaded inserts can be produced in various materials, such as brass, carbon steel, or stainless steel.