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Priority to ES1968137358UpriorityCriticalpatent/ES137358Y/en
Publication of ES137358UpublicationCriticalpatent/ES137358U/en
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Publication of ES137358YpublicationCriticalpatent/ES137358Y/en
Safety nut, which is characterized by the fact that its last threads are formed in conical helix, with an angle equal to that of the inner wall of an expansion box, machined in the upper face of the nut, which allows to compensate and retaining the elasticity of the material suitably treated, so that the nut is fastened to the bolt without damaging the thread thereof and without also damaging the thread of the nut, (Machine-translation by Google Translate, not legally binding)