As Steve pointed out, you can't pattern fastener if they are used with the fastener tool. However, if you define a part/assembly that defines the fastener and the area of material that captures the 'radius of influence', then you can pattern this part/assembly. The nice thing about this is that, depending on your model, you can use this method to allow you to quickly change the kinematic nature of the joint (for example, allowing or restricting on-axis rotations). For example:
Assembly A contains two parts: Radius A and Radius B which are connected with a beam element and two weighted-links. Assembly A is placed in an upper-level assembly and used to connect Part A to Part B; in this case, Assembly A represents the fastener. By using a global bonded model definition, the overlapping edges will merge together and result in a beam element connected to a radius of influence on each part. Since Assembly A is an assembly, it can be patterned in Parametric.
