The present invention relates to a monocortical pin (1) for an external fixator for temporary and / or permanent fixation applications for treating bone fractures and connecting two or more bone fragments together comprising an elongated cylindrical shaft (2). which extends along a longitudinal geometrical axis (x) and a conical portion (3) with a tip having an external thread for insertion of the monocortical pin (1) into a bone； wherein said elongated cylindrical rod (2) comprises a first portion (21) with a diameter (d) and an opposite second portion (22), wherein said opposite second portion (22) of elongated cylindrical rod (2) has a flat surface (2a) resting along a reference plane (a) parallel to the longitudinal geometry axis (x)； and said conical portion (3) with the tip having an overall length, measured along the longitudinal geometrical axis (x), equal to the diameter (d) of the elongated cylindrical shank (2) - 20% of said diameter (d). in accordance with the present invention, said conical portion (3) comprises a point (31) and a screw portion (32)； said tip (31) comprising a centering zone (33) extending longitudinally over a length of 6%； 8% of the diameter (d) of the elongated cylindrical rod (2)； furthermore the conical portion (3) further comprising two base cones (3a) and (3b) having two different taper angles, a first base cone (3a) in a distal position with respect to the elongated cylindrical rod (2) ) of the monocortical pin (1) and a second base cone (3b) in a proximal position with respect to the elongated cylindrical rod (2) of the monocortical pin (1)； said first cone (3a) having a taper angle of 130 ° C； said second base cone (3b) having a taper angle of 260 °.a presente invenção se refere a um pino monocortical (1) para um fixador externo para aplicações de fixação temporárias e/ou permanentes para tratamento de fraturas de osso e conexão de dois ou mais fragmentos de osso juntamente, compreendendo uma haste cilíndrica alongada (2) que
