Threadlocker
FM Metal Fasteners Group S.p.A.
Locking systems for fasteners
Designed for screws and bolts
Acrylic products designed to lock screws and bolts, preventing them from loosening due to vibration or mechanical stress. In addition to their locking function, they are available in sealing variants, which provide dual protection: mechanical and against leaks.
Hardening and resistance
They activate in the absence of air and upon contact with metal surfaces, withstanding the action of engine oils, water, gasoline, and hydraulic fluids. Hardening takes between 24 and 72 hours at room temperature. Coverage of the screw can be partial or total (up to 360°).

Our specific treatment solutions
Our threadlocking treatments meet specific sealing, safety, and functionality needs in every application. Explore the available solutions and choose the one best suited to your application.
Threadlocker sealants
Formulated to prevent fluid leakage or seepage in threaded joints. They do not have a mechanical locking function, but rather ensure a watertight seal.
Available in various chemical formulations, they are used in hydraulic, pneumatic, and oleodynamic systems, and all applications where sealing is a priority. They offer excellent compatibility with oils, gases, water, and fuels.
Anti-adhesion protective coatings
Pre-applied technical coatings prevent the adhesion of welding spatter and electroplating materials (such as primers or water-based liquid paints). They protect threaded surfaces and critical areas from contamination, facilitating subsequent welding or painting operations.
They protect threaded surfaces and critical areas from contamination, facilitating subsequent welding or painting operations.
Self-locking
An instant and reusable solution for ensuring the tightness of threaded joints. Made from polyamide-based materials, they are applied directly to the thread and provide an instant self-locking effect, without waiting times or temperature conditions. Available in any color and with partial (90°, 120°, 180°) or full (360°) coating.
While they offer good vibration resistance, they do not reach the sealing levels of a high strength chemical threadlocker, but they remain excellent where speed of assembly, reusability and compatibility with most industrial fluids and solvents are required.

Self-locking Sealant
Combines the advantages of a self-locking joint with those of a chemical sealant. An acrylic coating (usually white) applied 360° provides an immediate locking and sealing effect. Ideal for critical industries such as automotive, aerospace, rail, and marine.
Provides complete protection: prevents unscrewing and seals against liquid and gas leaks, even in extreme conditions. Maximizes safety and reliability.
Arrange a meeting or call
Need more information? Our team is at your complete disposal to provide you with further information, answer any questions you may have, and configure the system that best suits your needs.
Fill out the form and choose how you'd like to meet with us: a phone consultation, a meeting at your office, a meeting at our office for a demo, or simply request a call.
We will show you the solutions and useful steps, without obligation.
Contact us
Don't want to fill out the contact form? Call us or send us an email!
39 0522 271117
commerciale@fmspa.com