FIELD: medicine, prosthesis. SUBSTANCE: holding and fastening element to install prosthesis or its parts includes an element which is symmetrical against rotation axis and has external thread and central opening. At least one groove is designed in the form of a spiral around longitudinal axis of an element and passes at least along the largest part of external wall of an element, moreover, the mentioned part of the wall is supplied with external thread, direction of spiral coils of the mentioned groove is similar to external thread. EFFECT: higher efficiency. 2 cl, 16 cl, 4 dwg
