PartDaddy & Oly designed this printable anti backlash nut for M5 x 0.8 threaded rods and nuts.

Print out of ABS or PLA. I recommend hot settings for this part for better layer bonding and stregth. We use "Heavy" M5 Nuts. The spring is .030 inch wire x 5/16"OD x 1/2"Long. The spring isn't too critical because you can adjust the preload when you're assembling. Mount using 3mm metric or 6-32 inch size hardware. The 3mm posts on the part are flexible just enough for adjusting the backlash nut even after full assembly.

Attribution - Creative Commons

antibacklash, antibacklash, nut, axisthrustbearing, seemecnc, droplit