Nozzle element i.e. sealing cap, for use on collar of container, has helicoid thread covered radially in direction starting from wall and having profile distinct from profile of base helical thread to radially contact on closing element

摘要

The element (18) has a peripheral wall (52) for presenting a wall axis (A-A'). A base helical thread (57) radially projects in a direction of the wall axis starting from the peripheral wall, and is screwed on a complementary helical thread (26) of a complementary closing element (20). A retain helicoid thread (58) is covered radially in the direction starting from the peripheral wall and has a profile distinct from a profile of the base helical thread to radially contact on the complementary closing element.