Screwed conveyor belt fastener

Joining fastener for a conveyor belt, comprising two fixation plates (2 and 3) linked by hinge elements (1) in a U-shape, presenting in one of the fixation plates (2 or 3) linked by the U-shaped hinge elements (1), holes (4, 4′) allowing the passage of a screw (7 or 7′) and the gripping of its head and in the other fixation plate (3 or 2), dimplings (5, 5′) which are oriented towards the first fixation plate (2 or 3), the screws (7, 7′) passed into the holes of the first fixation plate (2 or 3) being able to be screwed in the dimplings which are arranged aligned with the holes (4, 4′) corresponding to the first fixation plate (2 or 3) when the fastener is tightened on one end of the conveyor belt, characterised in that each of the dimplings present at their base steps (8, 8′ and 8″, 8′″) extending around a part of their external circumference, but separated by two circular sectors (81, 82 and 81′, 82′) diametrically opposite, without any steps, generally oriented in the longitudinal direction of the conveyor belt on which the fastener according to the invention is set (or is to be set), the material of the fixation plate being sheared at the position of these non-deformed circular sectors in order to allow the formation of the step partially surrounding the dimpling, by stamping the fixation plate in which the dimplings are made.