CNBTR20 Series T Nuts Aluminum Slot Carbon Steel T Slot Nut Hammer Head Fastener Nut with M4 Thread European Standard Silver Pack of 50

Turn and lock-in quite nicely. I've seen other people complain (on 3D printer forums) that their t-nuts are such a pain, and how much work they have to do to get them locked in, and I don't know if other t-nuts are different, or if I'm just special....The rounded corners on the two corners make them turn in perfectly, just about every time. Every once in a while, I'll have a tight one for whatever reason, and that will take a couple tries to get it to rotate and lock properly, but I'd guess that is about 5% or maybe even less of the time.

These are OK, but it was my fault for not checking the dimensions of these t-nuts. The ones on my Creality CR-10s are 4.4mm total height, these are 4.72mm. Doesn't sound like a big difference, but these are too thick to turn and lock in the extrusion slots of my machine. Just a word to the wise! Otherwise, I have no complaints really, but now I need to grind a few of these down!!

Bought these for my tevo tarantula at the recommendation of one of the upgrades suggestion pages. Fit perfectly, almost exact to the ones that came with the kit. Some of the ones that came with my printer had the threads warped and spun diagonally so I was able to swap them with these and keep building rather than having to wait for replacement. Definitely saved the build and helped me attach some printed upgrade parts. One day shipping is also a plus.

There are some issues with these t-nuts. I got the M4 size. Out ofthe 50, 5 or 6 were totally bad. The thread was off. the botls will only go in only slightly and not though the nuts. Aslo, the angle on some of them is too salnted and will not rotate in place to lock for 2020 raling system. I had hard time making them work as the nus will not rotate easily to lock in place. I realized that profile is off than comepared to others I have from a kit that work perfectly. I was able to use 85% but it is not a peace of cake and is somewhat fustrating. Will not recomend as it is poor QC and deviates from the intended design.

These work well, as long as you put some pre-hardening threadlock on the bolt before screwing them down. That insures that the nuts turn properly to lock into the channel before tightening them down..

Product arrived timely and was what I expected.

GREAT TURN AROUNG TIME.

Good Product, as described and expected. Certainly fit my needs.

They screw on!

Bon rapport qualité prix.

Way better than the ones that came with my Anycubic 3D printer.

They fit well my 2020 profile

I've used about a dozen of them so far, no problems.