These are the parts that I used to make a 0.20mm nozzle for my Printrbot. I put together a video of the process here: http://youtu.be/kYImCO_SDms UPDATE: The above link is now the HD version of the video. The original link is http://youtu.be/01rWylsUFTU . I also uploaded my slic3r config that I'm using right now. Feedback on how to improve it is welcome! UPDATE: If you have been making nozzles like crazy, but need a place to keep them check out the http://www.jerrill.com nozzle case at http://www.thingiverse.com/thing:71322Watch the video!The brass acorn nuts I used were a pack of 25 1/4"-20 brass acorn nuts (P/N 92716A519) for USD9.16 from McMaster-CarrHere's a link to the catalog page: http://www.mcmaster.com/#catalog/119/3180/=llllkd