This is a post by Mike Brucker on Rand 3D site.

The Intelligent Fastener Extension (IFX) in Creo Parametric 3.0 allows you to automatically add standard screws, bolts, nuts, and washers to your assemblies. IFX will make sure that not only are the hardware parts placed in the correct location, but also that the necessary holes are made to the appropriate standard in the supporting parts/plates.

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