THE INVENTION: IT REFERS TO A THREAD LID THAT HAS A GUARANTEE BAND (3) THAT PRESENTS A THEORETICAL VERTICAL BREAKING SECTION (11) AND IS CHARACTERIZED BECAUSE TO RAISE THE PERIPHERAL ELASTICITY, IT IS PROVIDED TOGETHER WITH THE THEORETICAL BREAKING SECTION, A SCREWING (13) OF MATERIAL ACTING TO DOWNLOAD THE THEORETICAL BREAKING SECTION IN THE SCREW OF THE COVER AND IN THE TOOTH OF THE GUARANTEE BAND.
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