NUTS
High Performance Fasteners
Nuts are a key component in fastening systems, providing tightness, strength and security in the most demanding applications. EFS provides special custom-made nuts made from high-quality materials and available with different surface treatments to improve mechanical performance and corrosion resistance.
Main features of our special nuts:
REFERENCE STANDARDS
MATERIALS
HEXAGONAL NUTS
Hex nuts for custom bolts

Hexagonal nuts are among the most widely used in industry to provide strong and secure fasteners. They can be made in different strength classes and materials, with metric, UNC or custom threads to customer specifications.
SELF-LOCKING NUTS
Special self-locking nuts

Designed to prevent loosening due to vibration and stress, self-locking nuts feature nylon inserts or metal locking systems that provide a reliable seal even under extreme conditions.
FLANGED NUTS
Custom flange nuts for high-performance fasteners

Flanged nuts feature an enlarged base that distributes the load over a larger area, reducing the risk of loosening. They are particularly suitable for applications that require excellent vibration resistance.
DRAWING NUTS
Custom design nuts for technical hardware

When standard solutions are not enough, we make custom-designed nuts, adapting them to specific dimensional and mechanical requirements. Each nut can be produced with special geometries, treatments and materials to ensure optimal performance.
CAP NUTS
Cap nuts for protection and safety

This type of nut features a closed construction that protects the thread from dust, dirt and moisture. Ideal for aesthetic and security applications, the cap nut is available in a variety of finishes and materials.
CROWN NUTS
Special crown nuts for secure fastenings

Crown nuts are designed for use with cotter pins or mechanical locking systems. This configuration makes them ideal for applications where secure fastening is essential, such as in transmission systems and structural connections.
Customized special nuts
Our range of custom-made special nuts is designed to ensure maximum reliability and high performance in every context. With selected materials and advanced manufacturing processes, our nuts offer customized solutions for every technical requirement.
Rely on EFS to supply custom-made nuts that ensure safety and durability, with the option of dedicated surface treatments and quality certifications.