Blind fastening device which can be re-tightened after installation, and method for installation of a blind fastening device of this type

A blind fastening device for fastening of an assembly of a first element to a second element, an interface seal being positioned between the first element and the second element, the first element and the second element each comprising an orifice with a first inner diameter, the blind fastening device comprising:

• an actuation rod with a first end and a second end, the actuation rod comprising a first drive nut at the first end, a first rupture groove between the first drive nut and the second end, a threaded portion between the first rupture groove and the second end, and a deformation bush at the second end;
• and,
• a sleeve configured to be inserted in the orifices of the first element and the second element and having a first outer diameter which is substantially equal to the first inner diameter, the sleeve configured to be threaded onto the actuation rod, and the sleeve further comprising a first end, a second end, a tapped portion between the first end and the second end, a deformation bush at the second end, and a deformable portion between the first end and the second end and which is configured to be deformed radially until the sleeve has a second outer diameter larger than the first outer diameter, when the deformation bush of the actuation rod cooperates with the deformation bush of the sleeve,
• wherein the first rupture groove is configured to rupture when a tightening torque applied to the first drive nut creating a cooperation of the threaded portion of the actuation rod with the tapped portion of the sleeve exceeds a first predetermined torque,
• wherein the actuation rod comprises a second drive nut followed by a second rupture groove between the first rupture groove and the threaded portion, the second rupture groove configured to rupture when a re-tightening torque applied to the second drive nut exceeds a second predetermined torque greater than the first predetermined torque.