1.2 inch Captive Bolt. Made for small toddler obsessed with screwing and unscrewing things. Should print with a minimum of support, will still need some cleaning up.Print directly from .thing file - should print without interference. I have only tried it on "high" settings. The STLs are saved with correct location data, so do not let your software re-orient them. I also switched filament colors right before the nut started printing, then back again right after the threads finished for a more interesting look. Without much infill, over-torqueing the nut will cause the end of the bolt to po off, unless you print it in a different orientation than it is saved.