Shakeproof® Thread is a curved thread feature creating a mechanical interference with its internally threaded mating component. The curved thread or locking wave feature is dispersed evenly among the threaded body every 4^th pitch. Mechanical interference between the internal and external threads ensures the fastener stays tight regardless of its environment - vibration, shock, lubricants or heat.

With their graduated thread rolling areas, less driving torque is required to install these chip-free Tap/R™ screws, developed by ITW Shakeproof. Their unique thread configuration begins as a tapered, intermittent thread and increases to a full 360º thread form, providing progressive roll forming. A small pilot point minimizes cross threading and facilitates hole alignments, and they are reusable in the same hole without cross threading.