This is a printable anti-backlash nut that works with 8mm leadscrews with 2mm pitch. I have been using these printed versions on a cnc router for months and they work great. An application like a 3d print which requires much less torque would work wonderfully too. I will include a link to a few different lead screws on amazon that would work with this print.
500mm length: https://amzn.to/2xDROwj
400mm length: https://amzn.to/2xElObr
300mm length: https://amzn.to/2xyDt40
200mm length: https://amzn.to/2NXtVdf
Just a Modest Maker