The standard parts show only structural members in the subject release out of the box in the trial (Platinum) version of 2018 (the latest version that is CADWorx compatible as I now understand it). How do you access the standard fastener libraries?
Better late than never
Probably the easiest way. Right click on the ribbon area - Choose "Panels"- Choose "Components" as in image 01
On the "Components" window navigate trough the several options. Image 02
It looks like you're new here. If you want to get involved, click one of these buttons!