Mission Critical Bolting Solutions
J.Lanfranco products are built on 50 years of experience, and trusted world wide for their strength, performance, and reliability.
See for yourself, performance doesn't lie.
Strength
Quality
Performance
Est. 1974. Quality, performance, and reliability. These are characteristics stamped onto every product we make. From locking ability and interaction with the mating bolt to material quality and corrosion resistance, we observe, refine, and implement all principles of safety-critical bolting to ensure you get a superior product.
Case Studies
Ensuring Smooth Railway Traffic with the THU Locknut
Recurring fastener loosening at a busy railway diamond meant daily inspections. See how THU Locknuts solved the problem and maintained reliability in extreme conditions.
View the Case StudyMaximizing Shaker Table Reliability with THU and ERM Locknuts
Shaker tables in mining operations are prone to downtime due to loosened screens under extreme shock and vibration. J.Lanfranco THU and ERM locknuts provide high repeatable locking, integrated washer support, and multiple install/removal cycles to keep plants running efficiently.
View the Case StudyEliminating Loose Bolts on a Class 1 Double Diamond with THU Locknuts
A busy Class 1 double diamond faced frequent loose and seized bolts, causing weekly maintenance headaches and high costs. J.Lanfranco THU locknuts provided predictable locking, eliminated weekly replacements, and saved $50,000 in six months.
View the Case StudyReliable Valve Plate Installation with ESL Locknuts
Traditional two-piece locknuts create installation complexity, risk of galling, and inconsistent clamp force on compressor valve plates. J.Lanfranco ESL locknuts simplify installation while ensuring precise torque, perpendicularity, and long-term reliability.
View the Case StudySecuring Railway Cover Boards Against Vibration
Vibration and collector shoe tension caused loose fasteners on power rail cover boards, risking safety and service disruptions. ERM locknuts provide a reliable, easy-to-install solution that keeps cover boards secure under daily train operations.
View the Case StudyEliminating Seized Nuts in Compression Check Valve Assembly
Seized locknuts during installation and maintenance were driving labor costs, downtime, and warranty risk for a compression check valve OEM. By switching to J.Lanfranco ESL locknuts, the manufacturer eliminated galling without anti-seize and standardized production at scale.
View the Case StudyEliminating Bolted Joint Failures in Cement Ball Mills
Sustained vibration and extreme temperatures make bolted joint failures a constant risk in cement production. A large European cement producer eliminated fastener-related downtime by installing J.Lanfranco ESL self-locking locknuts on critical ball mill assemblies.
View the Case StudyRebuilding a Collapsed Railway Bridge with the ESL Locknut
When a major railway bridge collapsed under heavy freight traffic, the failure wasn’t visible bolt loosening—it was silent clamp force loss.
View the Case Study
Our Locknuts Are Used By Industry Leaders
Companies and organizations throughout the world depend on J.Lanfranco locknuts for a wide range of mission and safety-critical applications. Time-tested in various industries and applications – city buses and railways, military and aerospace, mining and energy – our products have distinguished themselves as the premiere choice for their performance, versatility, and safety record.
Testimonials
We are incredibly impressed with J. Lanfranco’s modular fixtures for revolutionizing our manufacturing operations. The versatility and accuracy of these fixtures have empowered us to streamline production processes and achieve consistent, dependable installations. Easy to install and integrate into our designs, these fixtures provide the adjustments we need effortlessly. Their exceptional design and engineering excellence shine through in every aspect. For optimized panel, HVAC, and ceiling installations in commercial vehicles, we wholeheartedly endorse J. Lanfranco’s modular fixtures.
Modular Fixtures
Alexander
Chief Operating Officer
J. Lanfranco not only offers exceptional products but also provides outstanding customer service. Their team is knowledgeable, responsive, and always willing to go the extra mile to assist customers. They guided me through the product selection process, ensuring I had the right solutions for my projects. Additionally, their delivery quality documentation is clear and easily accessible, which makes receiving parts and qualifying them with our end users that much easier. A special Thank You to Aaron Kerr who is my go to guy at Lanfranco.
Customer Service
Isabel
Purchasing Manager
NFE and Trepp Washers- Thank You J.Lanfranco! These parts were a nightmare to get in the quantities we needed and especially with coatings like Geomet® or Delta®-Protekt. However, the team at Lanfranco regularly had these stock or available in less than a couple of weeks for us. From needing a few hundred pieces to +50,000, they were able to take care of us.
Washers
Kevin
Maintenance Supervisor
I’ve tried lots of different all-metal locknuts, but J. Lanfranco’s ESL and THU nuts stand out from the rest. J.Lanfranco locknuts are easy to install and ensure a secure installations every time. No retraining of our staff was needed, nor did we need any special tools or bolts. The consistency of performance is what we like best.
General
Maria
Senior Mechanical Engineer
Lanfranco Fasteners are tough, reliable and built to last - simply the best in the industry - just like Jason and his team. Whether you’re mining for gold, copper, iron, coal or bitumen the best way to increase production - is to reduce downtime - and to do that you can count on Lanfranco Fasteners!
Mining
Steve R.
Manager
When it comes to hard to find metrics, J. Lanfranco is my trusted supplier. Their selection is extensive, catering to a wide range of applications. We’ve used them for items under ISO, NFE and JIS standards. J. Lanfranco delivers with precision and reliability. Flexible shipping options get the products to us where we need them and when we need them.