For over six decades, Long-Lok has stood as a trusted name in engineered fasteners, providing advanced solutions for threaded fastening challenges across aerospace, defense, automotive, and industrial applications. Known for reliable performance in demanding environments, Long-Lok’s product portfolio spans self-locking and self-sealing fasteners, specialty inserts, and a range of engineered thread-locking technologies specified by engineers around the world.
At the core of Long-Lok’s offerings are its self-locking fasteners—designed to maintain secure engagement even under high vibration, shock, and thermal cycling. These products use innovative prevailing torque mechanisms, including proprietary patch materials and strip designs, to prevent loosening without the need for additional hardware or adhesives. This category includes classic Long-Lok® strip fasteners and other engineered solutions tailored to specific torque and environmental requirements.
Long-Lok’s Poly-Lok® line represents the company’s most advanced prevailing torque fasteners. Featuring a unique polyester patch bonded permanently to the thread surface, Poly-Lok fasteners deliver excellent vibration resistance and shock absorption. Their patch design not only locks assemblies securely but also offers built-in sealing and resistance to chemicals like oils, solvents, and brake fluids. With reusability and stable performance across wide temperature ranges, Poly-Lok continues to be a go-to solution in critical applications.
For applications requiring both fastening and fluid sealing in a single part, Long-Lok’s Self Seal® fasteners deliver exceptional performance. These components incorporate O-rings under the head that compress to form positive seals against liquid and vacuum pressures while providing consistent fastening torque.
In addition to threaded fasteners, Long-Lok offers inserts, such as T-SERT®, which provide secure threads in softer or damaged materials. These engineered inserts ensure long lasting connections where traditional threads might fail, enhancing structural integrity in assemblies that require repeatable torque and durability.
Building on decades of thread-locking expertise, Long-Lok will now be offering Nylon Spray Patch. Unlike traditional patches applied manually or via strip, the Nylon Spray Patch uses a controlled application process that sprays nylon polymer precisely where needed on the threaded surface.
This method offers several distinct benefits:
Nylon patch technology has been widely embraced for its ability to lock threaded assemblies in place while allowing repositioning or disassembly when required.
Long-Lok’s steadfast commitment to solving complex fastening problems is evident across its product lineup—from self-locking and self-sealing fasteners to specialized inserts tailored for demanding engineering environments. As assembly challenges evolve, Long Lok continues to refine and expand its offerings, ensuring engineers have access to reliable, high-performance fastening technologies backed by over half a century of industry expertise.
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