In SW2010sp5 I have been experimenting with my own fastener (a nut). It has a DIN M6 tapped hole. When I apply a smart fastener it selects an M6 but after it has assembled the correct bolt a rebuild changes it to M8?! Any ideas of how to stop this? The other issue is it also mates concentric correctly but coincident in the wrong direction.
SolidworksAssemblies