"http://www.gpi.org/industry-resources/finish-drawings http://www.seaquistclosures.com/@SCWebsite2/Include/technical_manual_14nov2008.pdf http://www.bellcoglass.com/sites/default/files/kcfinder/files/Thread%20Finishes.pdf http://www.ipushi.com/upload/perusal/p2010100214471045.pdf The above should help people create functional neck/threads for finishing bottles.  No sense in starting from unknown in this department.  "