The new Ultra-Bolt rivet gives you a full 2-10mm grip range, together with 16,000N shear strength. This could be the ideal solution.

The mandrel has a "locking skirt" which is opened out into the head of the rivet during setting. Proper opening of the skirt requires use of a special nosepiece.

Self-Bolt is a "wiredraw" rivet, where the hollow mandrel head adapts to the thickness of the workpiece. This does require, however, that you use a back sheet that is thick and rigid enough to allow the "wiredraw" effect, and also to prevent hole deformation.

You should use the S-Bulb or SelfLok rivets, which are designed for use with thin sheets. Due to the "bulbing" effect during setting, you do not apply pressure on the hole, so there is no risk of hole deformation.