POLISI3D 2-Pack 3D Printer T8 POM Anti Backlash Nuts for Lead 2mm / 4mm / 8mm Acme Threaded Rod Eliminate The Gap Spring DIY CNC Accessories pitch 2mm lead 4mm T8 POM

I tried the standard brass running nut and the split brass nut on my Ender 5 Plus and they squeak although well lubricated. Found these plastic type split running nut and now silent. Although plastic they do work well. It's not easy to fit the screws and nuts but found that fitting the screws bottom up and the locking washer and nut on top worked OK.

Easy to fit, fixed a horrible high pitched squeal on z axis.On the Ender 5 plus they dont act as anti-backlash, gravity easily overcomes the spring on these but they are still useful to fix the squeal and that's what most want these for anyway.

Added to my aging Anet A6 and with some other upgrades it prints as well as my Ender 3 and TRonxy machines now. no more z banding!

Does the job well. Ender 5 plus has had about 100 hours use and still going strong with this mod!

I used this as a replacement for the ones supplied with my cnc machine. These really eliminated the play I had in my z axis carriage. Really tight fit and virtually no backlash. Very happy.