Clamp (1) that can advantageously be applied to both temporary and definitive orthopaedic external fixation systems comprising: - a first coupling element (2), comprising a pair of opposite jaws (3, 4) together defining one or more seats able to house at least a first component of the orthopaedic external fixation system - a second coupling element (8), comprising a pair of opposite jaws (9, 10) together defining one or more seats able to house at least a second component of the orthopaedic external fixation system - an interconnection pin (7) passing through and connecting the first (2) and second (8) coupling elements along a main axis of rotation (x) - fastening means arranged to bring the clamp (1) from a slack configuration, wherein the first (2) and second coupling elements (8) are relatively rotatable at least along the main axis of rotation (x), to a locked configuration, wherein the first (2) and second coupling elements (8) are relatively rotatable with each other these fastening means dividing in - temporary fastening means, which can be manually operated, to temporarily lock the clamp (1) - definitive fastening means, which can be operated by means of a fastening tool, to definitively lock the clamp (1).Una abrazadera (1) que ventajosamente se puede aplicar a sistemas de fijación ortopédica externos tanto temporales como definitivos, comprendiendo: - un primer elemento de acoplamiento (2) -, que comprende un par de mordazas opuestas (3, 4) que juntas definen uno o más asientos capaces de alojar por lo menos un primer componente del sistema de fijación ortopédica externo - un segundo elemento de acoplamiento (8) -, que comprende un par de mordazas opuestas (9, 10) que juntas definen uno o más asientos capaces de alojar al menos un segundo componente del sistema de fijación ortopédica externo - un perno de interconexión (7) - que pasa a través y conecta a los primer (2) y segundo (8) elementos de acoplamiento a lo largo de un eje de rotación principal (X)
