Creo Simulate : Static analysis of a stud with Contacts

Hi,

I am trying to run a static analysis of a threaded member and am not sure on how to model it as the threaded member and bracket have clearance.

please refer to the image attached. Item # 1 is the object of interest. it passes through and is held in position by the welded bracket (Item # 4). Should i be using a contact interface between the components 1 and 4 ?

Could anybody throw some light on how to get this ready for analysis please?

Using Creo Simulate 7.0