A nut, a fastener provided with a nut, and a fastening device therefor.

摘要

A nut (1') arranged on a bolt (2) has a first portion (4) spaced in an axial direction from a washer (3) and having a polygonal outer surface, and a second portion (5) located between the first portion and the washer (3) and having a transverse dimension (d) which is smaller than a transverse dimension of the polygonal surface of the first portion (4) of the nut (1'). A holding element (6) engages with the washer (3) so as to hold the washer and to prevent it from turning, and a driving element (7) engages with the polygonal surface of the nut (1') and turns the nut.