Self-locking Threaded Fasteners

Tek-Lok® self-locking threaded fasteners obtain locking action from an engineered plastic pellet compressed into a hole drilled in the threaded region of the fastener, to a depth slightly below the root of the thread. Pellet size and location are standard but can be altered to meet special requirements.
The locking action, partly produced by friction developed between the pellet and the mating thread, results from the metal to-metal friction opposite the locking pellet. The pellet acts as a wedge and creates a counter-thrust when deformed, while the inherent memory of the pellet strives to regain its original shape, causing positive locking. Since the lock action exists at all times, Tek-Lok fasteners are ideal for “adjusting” applications, when it’s essential that the fastener stays in a specific position without being seated. Tek-Lok fasteners are produced in both military and commercial grades, and are offered in a variety of insert materials for cryogenic to high temperature applications.