How does solidworks simulation model a counterbore/countersink screw connector?

There is some good information about connections to nodes in the knowledge base, but only makes reference to with/without nut and with/without tight fit. Does solidworks assume a screw going into a tapped hole is a tight fit? If so, does it apply rigid links to the entire cylindrical surface of the tapped hole or is there a parameter for length of thread engagement? I suppose a split line could probably be used for that though.

SolidworksSimulation