Tool for interference installation in a bore of at least one structure of a fastener comprising a head housed in a sleeve flange and a gripping element, said tool comprising a first body extending along a first main axis and having:
- at least one load-bearing surface, one of which also forms a load application surface;
- a load transmission surface;
- and
- a housing extending along the first main axis from a first end of said first body, said housing being extended along the first main axis by a bore extending from said housing to a second end of said first body;
- said tool being characterized in that the load transmitting surface is arranged at the second end of the first body and extends perpendicular to the first main axis, said load transmission surface being dimensioned so as to be able to bear simultaneously on the head and the sleeve flange.