Repair cylinder stud, suitable for Solex

When the stud threads are stripped, there are only two solutions:

install a threaded insert (Heli-Coil) but the procedure is sometimes risky because there is not much space or material

OR

install this repair stud: one side is larger than the other, which allows you to re-drill to 6mm and tap to 7mm, then screw in the stud. The other side remains the same, allowing you to screw on the cylinder nut without any problems.