3D fully parametric solid models of the common fasteners used for designing Machines, Fixtures and Vehicles systems: 

Used with AutoDesk Mechanical Desktop rel 2.0 linked to Microsoft EXCEL spreadsheets to choose commercially available sizes and lengths of both INCH and METRIC fasteners. 
Can be instanced into 3D assemblies and parametrically constrained to the other components. 
Based on the styles, sizes and lengths published in the 1998 McMASTER-CARR catalog.  Avoid choosing sizes and lengths that are not available.  The size and length is not in our software unless it is published to be available in the catalog. 
Automatic 2D views can be generated in Paper Space and exported into AutoCAD 2D drawings.  The parametric models can be "exploded" (like any other MDT model) and made into AutoCAD rel 14 or 13 3D solid objects. 
Over 5000 fastener components that can be parametrically created on demand from 31 master files linked to spreadsheets. 
INCH and METRIC sizes for common fasteners 