Long-Lok: Precision Engineered Fasteners and a New Era of Nylon Spray Patch  Technology 

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.  

Self-Locking Fasteners: Solving Vibration-Induced Loosening 

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.  

Poly-Lok® Patch Type: Advanced Prevailing Torque Technology 

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.  

Self-Sealing Fasteners: Combined Sealing and Locking Performance 

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.  

Inserts: Thread Reinforcement and Specialty Solutions 

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. 

Introducing Long-Lok Nylon Spray Patch 

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: 

• Tailored Patch Geometry: By spraying nylon onto specific thread zones, engineers  can control the patch coverage and location, optimizing performance for unique  assembly requirements. 
• Enhanced Vibration Resistance: The sprayed nylon creates a prevailing torque lock  that resists vibration-induced loosening while maintaining serviceability. 
• Improved Process Efficiency: Spray application enables faster, automated  production compared with manual or discrete patch methods, making it ideal for  high-volume manufacturing. 
• Expandable Customization: Coverage options allow engineers to balance locking  force, torque requirements, and reusability depending on the application. 

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.