This is custom nipple I designed to incorporate a proprietary Buttress threaded connection with a standard Triclamp sanitary fitting.  The design was first modeled in Autodesk Inventor and then 3D printed to check for dimensional tolerancing and functionality.  After the functionality was verified, the design was sent out to be machined from 316 Stainless Steel.  The finished product turned out very well.

3D Printed prototype next to the production turned stainless steel version.