The 0-FASTENERS sub-group is a collection of common fasteners and/or assemblies that have parametric or assembly features assigned to them.

Shim Washer

A simple washer that's dimension driven for I.D and O.D. and use handle for thickness.

U-Bolt Assemblies.

U-Bolt Assemblies use design variations for modeling, to change the Design Variations, you must click the associative PART (not the Assembly) to access them.