Fast and chipless fastening with Kilton self-forming Torx screws

The trilobular countersunk head screws with Torx drive offered by Kilton Srl are an advanced technical solution for direct fastening into steel and light alloys without the need for pre-threading. Thanks to their triangular cross-section and metric thread, they are ideal for blind or through holes, ensuring a strong and lasting hold.

High-performance self-forming screws

During tightening, the screw plastically deforms the material, forming the thread directly within the hole and eliminating any play between the screw and the mating thread. This process ensures high resistance to pull-out and loosening, even under vibrations. Since no chips are produced, these screws are particularly suitable for applications requiring clean, debris-free holes and compliance to specific standards.

Hole compatibility, technical advice from Kilton experts 

Fastening performance is concentrated within the first 20–25 mm from the insertion point. It's essential to drill holes to the correct size: a diameter 0.4–0.5 mm smaller than the screw is recommended, with a maximum taper of 1° for die-cast applications.  Improper tapering can compromise fastening performance, especially under demanding conditions.

Torx drive for higher tightening torque

The Torx drive allows more efficient torque transmission compared to other conventional drives, reducing the risk of cam-out. It is especially recommended for diameters above 4 mm. The geometry of the recess and specific lubrication reduce tightening effort by up to 30%, improving operational efficiency.

Surface treatments and availability

The screws are available with galvanic coatings compliant with the RoHS standard, including zinc-plated, black, Lanthane, and other special finishes. Kilton's range includes diameters from M2.5 to M8 and lengths up to 30 mm, with extensive stock availability.

Industrial applications and quality certifications

The trilobular countersunk Torx screws are used across various industrial sectors, including automotive, electromechanical, electronics, and machine tool components. They are ideal for assemblies on die-cast parts, thin sheet metal, and light alloy components where a stable, fast, and chipless fastening is required.

All models undergo strict quality controls and surface treatments in compliance with the European RoHS directive, ensuring long-term reliability and compatibility with the environmental requirements of major international regulations. Available versions include Cr3 zinc plating, black finishes, and special treatments such as Lanthane or Finigard, designed to improve corrosion resistance even in harsh environments.

To request a personalized quote for the most suitable trilobular self-forming screws for your industrial applications, contact the Kilton team using the provided details.