Adapters with conical locking of the EMC shield for polyamide conduits with internal tin plated copper sleeve. these adapters are compatible with the whole range of polyamide connectors with male thread. Locking of the sleeve is brought about by a conical element which acts along the whole circumference, thus guaranteeing continuity of the system in applications subject to mechanical strain as well as a high level of safety in the event of a short circuit. Interference of electrical signals generated by magnetic fields are transferred to the casings by means of the metal braid and the EMC blocking adapters. Particularly recommended for industrial applications, on board machine tools and railway vehicles (used together with flexible conduits with low fume emissions, in compliance with UNI CEI 11170). ISO metric thread in compliance with standards CEI EN 60423.