A screw cap for the fixing of screws that is characterized by being formed by a cylindrical body smoothly externally in its first third and provided in the rest of its length with a helical groove whose turns have a conical inclination favorable to the direction of penetration and whose a sharp edge constitutes an obstacle opposite to its eventual regression; completing with a tubular and axial cavity that penetrates from its head in the proportion equivalent to the first indicated third approximately while the remaining and lower area appears sectioned by a longitudinal diametrical cut that starts at the truncated end of the cap and creeps from side to side to the entire striated body of the block. (Machine-translation by Google Translate, not legally binding)
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