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BATALLE ALMARAZ JOSE
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BATALLE ALMARAZ JOSE
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Application filed by BATALLE ALMARAZ JOSEfiledCriticalBATALLE ALMARAZ JOSE
Priority to ES1981258538UpriorityCriticalpatent/ES258538Y/en
Publication of ES258538UpublicationCriticalpatent/ES258538U/en
Application grantedgrantedCritical
Publication of ES258538YpublicationCriticalpatent/ES258538Y/en
Security screw, essentially characterized in that its head is formed by three parts, one of which, of cylindrical configuration and smaller diameter than the head, has on its outer surface two recesses of planes parallel to the axis of the screw, while each one of the other two parts presents the configuration of a semi-nut without internal thread and with a projection on its inner conjugate part of one of the recesses of the first piece, in order to the constitution, by association to said first piece, of a polygonal head capable of being operated by means of a pipe wrench. (Machine-translation by Google Translate, not legally binding)