SPECIAL SCREWS

High fastening strength

Special Screws for Industrial Applications

Special screws are critical fastening components designed for industrial applications requiring high precision, mechanical strength and long-term reliability.

Unlike standard fastening components, special screws are manufactured according to specific project requirements and can be produced with customised geometries, dedicated materials and advanced surface treatments to ensure maximum performance even in demanding operating environments.

EFS supplies special screws manufactured in high-strength steels, stainless steels and special alloys, supporting industries where reliability and performance are essential.

REFERENCE STANDARDS

  • UNI
    5737, 5738, 5739, 5740, 5933

  • DIN
    931, 933, 960, 961, 7991, 912, 7984

  • DIN
    6921

  • ANSI
    B18.2.1

  • ISO
    4017, 4014, 14399/3, 14399/4, 4762

DRAWN SCREWS

EFS - Prodotti - Viti e Bulloni speciali a disegno per bulloneria industriale

Drawn screws are designed according to the customer’s specific requirements and drawings, tailored to meet particular mechanical and functional needs. Each screw can be manufactured with customised geometries and specific surface treatments to enhance strength and durability.

HEXAGON HEAD SCREWS

EFS - Prodotti - Vite testa esagonale bulloneria tecnica

This screw is designed to provide a secure grip and optimum torque. Available in various lengths and threads, it is widely used in mechanical and structural applications.

SOCKET HEAD SCREWS

EFS - Prodotti - Vite testa cava per fissaggi industriali

Hollow head screws are designed for applications requiring reliable fastening in tight spaces. The socket for Allen or Torx wrenches enables precise and secure tightening.

TORX SCREWS

Torx screws are designed to ensure high torque transmission and reduce the risk of damage to the drive. They are ideal for industrial applications that require precise, repeatable, and reliable fastening.

FLANGED SCREWS

Flanged screws feature an underhead flange that distributes the clamping load over a larger surface area. They are particularly suitable for applications subject to vibration and high mechanical stress.

HAMMER SCREWS

EFS - Prodotti - Vite a martello per assemblaggio industriale

Primarily used in rail and profile assembly systems, hammer screws allow quick and reliable fastening without the need for extra drilling. They are also well suited to industrial applications

BIHEXAGONAL OR STAR-SHAPED SCREWS

Hexagon socket screws, also known as star screws, are designed for high-performance applications that require high torque. The 12-point drive facilitates installation and ensures optimal force transmission.

GRUB SCREWS

EFS - Prodotti - Grani per fissaggi industriali personalizzati

Grub screws are headless screws used to secure mechanical components without protruding from the surface. They can have tapered, flat or cylindrical tips depending on the fastening requirements.

DOUBLE DIAMETER SCREWS

EFS - Prodotti - Vite doppio diametro per applicazioni tecniche

This type of screw features two sections with different diameters, which are ideal for ensuring optimal fastening in components with holes of different sizes.

NEED A PARTNER FOR SPECIAL BOLTS?

We supply custom-designed fasteners for critical applications — with certified quality, full traceability, and technical support.
Fill out the contact form or call us: our team is ready to assist you with tailored solutions.

Production Technologies and Available Manufacturing Processes

EFS uses different manufacturing processes according to dimensional specifications, required performance and application needs. We supply hot forged fasteners, turned fasteners, cold formed fasteners and components with protective surface coatings.

Reference Standards and Specifications

Special fasteners can be manufactured in accordance with the main international standards commonly adopted within the industrial fastening sector.
To explore the world of technical fasteners in greater detail, visit the website of Fasten, one of the leading international exhibitions dedicated to the fastening industry.

Special Screws for High-Reliability Applications

Special screws represent an essential component within fastening systems used in demanding industrial environments.

Using carefully selected materials and controlled manufacturing processes, EFS develops fastening solutions designed to ensure durability, safety and high mechanical performance over time.

Our technical team supports customers with custom solutions developed around specific operational and project requirements.