Rivnuts - Diamètre de forage
Outil : Memfast
Memfast : drilling holes pour rivnut
The rivet nuts tend to come in slightly under the stated outside diameter size which means the standard size drill bits which you are refering to should be suitable, i.e., 10.0mm, 10.5mm, 11.0mm etc.
I hope this helps. If need be the next available size drill bit should suffice - preferably in 0.5mm increments as the rivet nuts expand outwards slightly as they pull down.