The present invention relates to a female coupling of the screw type comprising a ball bearing (40') which guarantees the rotation of the block (20') intended to couple the male coupling with respect to the block (10') which can be gripped by the user and connected to the line. In particular, the present invention is characterized in that said female coupling is configured so as to facilitate the assembly of the bearing in the female coupling. The female coupling according to the present invention is further characterized in that the bearing is maintainable by the end user.
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