Ultimaker Trap nut
thingiverse
this is a replacement for the brass fitting in the ultimaker. the nut used is a 3/8"-12 acme thread. The design fits like a glove in the ultimaker print bed set up. There are 3mm holes for retaining screws, but they are not needed (they are actually in the wrong place... but because they are not used I never fixed it).
Download Model from thingiverse
With this file you will be able to print Ultimaker Trap nut with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Ultimaker Trap nut.