100-Pack 2020 2040 2060 Roll in Spring Loaded T Nut M5 for 20x20 20 Series Aluminum Extrusions 6mm Slot Aluminum Profile Accessories (m5)

Very consistent machining for the holes and threads are 90 degrees from the mating surface exactly like they should be rolls into 2020 extrusion nicely glad I purchased them instead of using the cheap tnut hardware that came with the brackets I already purchased

The media could not be loaded. I saw quite a few reviews saying that these "wouldn't roll in as advertised. I had no problem getting then and and staying in place. The secret was to use a tool...specifically a long 5mm screw turned into the nut threads , fully engaged but not past the back side. That allowed me just enough oomph to get these to snap into place pronto. You have to get one side just below the flange of the extrusion and then rotate it. It doesn't feel like it will fit but only a little force popped it right in. I am loving the fact that they don't slide around as you make you connections, but sliding it into position after the screw is in but not tightened was as easy as 3.1416 pi ! Good product. I will definitely buy again as the need arises.

If you are using good quality extrusions these fit really well and I can put them in and take them out as expected. With cheaper extrusions I found them to be very tight. I could put them in but not take them out except by sliding them to the end. I keep both the M5 and M3 sizes in the house all the time. They are not that expensive and the frustration of needing one and not having one makes it worth the cost.

I should had tried these earlier. I am using them to make a mount for my HOTAS joysticks and got real tired of messing with regular t-nuts. Regular t-nuts would not always rotate into place to lock securely into place. These t-nuts slide into place and stay in-place till I fix the part to the extrusion.Cost more than regular t-nuts but are worth it for me.

They fit and hold well. They also make secondary assembly much easier. 3 out of 100 were loose in the extrusion but still held well. Easier than using the "Hammer Head" type. Overall a good product

As mentioned by others, these do not roll into some extrusions (LDO's anodized kits, in my case) UNLESS you file down one side of the flat edge of the nut, but are fantastic nonetheless. Preloading them in my Voron v2.4 has been fantastic. Once torqued down, they do not move at all.

These worked great, were easy to install and use. No complaints.

does not roll in, have to use a screw to pry them into place, much force aggressive, not fun. do not listen to other seller who says its not that bad. it is that bad.