Nickel plated brass accessories, are used as a technical solution in the polyamide conduits protected by metal braid. They consist of two cylindrical half-shells suitably shaped in order to fit inside the corrugation of the conduit and prevent it from sliding axially. They are placed in the end part of the conduit as protection from accidental drill- ing and for the application of a clamp with grounding screw without deforming the conduit.