Long-Lok Fasteners Corp.

United States

Dri-Loc adhesives (from Loctite Corporation), applied to threaded parts, form a unique coating that converts ordinary fasteners into self-locking fasteners.Dry to the touch, Dri-Loc adhesives become an integral part of the fastener and stay inert until parts are used. During the assembly process, Dri-Loc adhesive is activated by assembly forces, releasing anaerobic adhesive which locks parts securely.Dri-Loc adhesives are applied to the full circumference of the fastener. Resin fills all voids in the threads when installed, and cures to form an excellent seal to both liquids and gases. (For pre-applied non-locking thread sealant, see Vibra-Seal)Dri-Loc adhesives are designed for applications where specific shear strengths, temperature range and substrate types are necessary.All Dri-Loc adhesives harden in the absence of air on ferrous and nonferrous metals without primer, activators or heat. They exhibit controlled lubricity, low on torque and are dry to touch for ease of assembly with automatic or hand tools.

Poly-Lok is todays most advanced, most reliable prevailing torque type self-locking fastener. And its all due to the unique polyester patch material that is more resilient, has higher strength, and can be reused more often with higher retained torque values than any other patch material.Even the Poly-Lok manufacturing process is unique. The patch material is applied by a patented process of consistent amount, controlled as never before possible with this type of locking method. Thanks to this engineered proprietary control of patch size and location, dependable prevailing torque performance is achieved consistently from part to part. This exclusive Poly-Lok patch area control capability allows us to produce non-standard torque values custom tailored to your requirements; a control not attainable with spray-on patch methods. It all adds up to extra-reliability and dependability in almost any threaded fastening application.The versatility and locking characteristics of the Poly-Lok patch open up a whole new range of fastener applications. From the aerospace to automotive market, engineers everywhere are finding out how well Poly-Lok self-locking fasteners can solve their assembly problems.

The patented Dual-Lok process is designed specifically for use in higher temperature applications. Using Vespel inserts as its locking element, Dual-Lok fasteners have the capability to withstand high to low temperature cycling (-450F to +500F; -268C to + 260C) throughout at least 15 removals. Dual-Lok fasteners meet all of the requirements of IFI 124 and MIL-DTL-18240.

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.

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 its 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.

The Omni-Lok process is a patented method to make bolts and nuts stay in place, regardless of the extent of vibration or temperature stress. Omni-Lok fasteners meet all specifications of MIL-DTL-18240, including those requiring as many as fifteen reuses.Omni-Lok fasteners incorporate single or multiple pins, fully contained in holes located within the thread, and held parallel to the longitudinal axis. The pin is precisely located in such a manner that the outer diameter of the pin extends above the root diameter of external threadsand below the minor diameter of internal threadsat a controlled height. This provides the required torque, creating an effective wedge in the threaded assembly for frictional resistance to rotation, i.e. prevailing torque.