Smart Fasteners added to hole patterns use a bolt pattern derived from the hole pattern. The fasteners are all the same and there is only one fastener listed in the Smart Fasteners PropertyManager. If you want to change the properties of some bolts in the pattern, (for example, make them longer), you can specify different configurations of the bolt.
Each time you specify a Smart Fastener, you
add it to your Toolbox database. Smart Fastener follows the Files options in the SOLIDWORKS Toolbox Toolbox - User Settings dialog box to determine if fasteners are added to an assembly as a configuration of
an existing part or as a copy of an existing part. For information about configuring
Toolbox, see Configuring Toolbox.