4040 corner frame bracket
thingiverse
corner bracket for outside of 4040 extrusion, use 8mm bolts, the raised areas fit into the slots of the extrusion to keep everything aligned
Download Model from thingiverse
With this file you will be able to print 4040 corner frame bracket 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 4040 corner frame bracket.