ARQQ 2Pcs T8 Anit-Backlash Spring Loaded Nut Elimination Gap Nut for 3D Printer CNC Machine 8mm Acme Threaded Rod Lead Screws

Please update the description of the item. These are for LEFT handed 4 start 8mm acme screw. It is my mistake that I assumed and wanted to get them fast... I needed single start and right handed... But, I am keeping them for future projects.

Look good but a lot of machining flash around the edges. Seems like quite a bit of friction for a bronze nut even after lubing.

I added this as well as toothed idlers to my printer and after I did when I print something with threading it slips on perfectly before I had to work with it for a while till it loosened up but now it comes off the printer working like a dream I can't say its only due to this since I added the toothed idlers at the same time but its a great upgrade

image shows the holes threaded. ordered 4 and none have threaded mounting holes.

I bought these and paid a premium price because it stated there were threaded . !!!THESE ARE NOT THREADED!!!Had to cut one side to fit it...And now after trying to install them on CR-10S5 the unthreaded holes don’t line up anyway.

I tried to install this on my CNC mill's lead screws and it would not thread for s***. The threads don't catch at all, and it does not work at all. My mill uses T8 8mm lead screws

They do what they are supposed to.