Self-locking Fasteners

The unique, all-metal Dyna-Thred II design is a technological breakthrough in reliable self-locking fasteners. Extensive tests prove that the locking action of Dyna-Thred II fasteners maintains minimum torque requirements after more than 15 re-uses.
The patented Dyna-Thred lock is formed of the fastener itself and requires use of no additional locking element materials. Locking action takes place in a full hoop, 360° around the thread, providing an equal load on all sides. Dyna-Thred II fasteners are available in a wide variety of head styles, materials, finishes, and sizes.
The useful temperature range of Dyna-Thred II fasteners is limited only by the physical characteristics of the parent bolt material. From cryogenic applications to sustained high temperatures, Dyna-Thred II fasteners stay locked in.