T-nut M3 drop-in rotating V-Slot

T-nut for 20x20 or 20x40 V-Slot aluminum extrusion (6 mm gap) compliant with original metal T-nut but adopted for M3 nut.

There's also a version that fits to #4-40 x 3/16'' nut:
https://www.thingiverse.com/thing:3366563

Fits for most of the printers based on V-Slot, e.g. Creality (CR-10, Ender 3, Ender 5), Tevo (Tarantula, Tornado), Tronxy (X1, X3, X5S) and many more

Put it in the profile slot and turn the bolt - it will turn and find its locking position.

Check out my other designs:
https://www.thingiverse.com/DaVinci2000/designs

A decent set of M3 hex bolts and nuts can be found on Banggood:
https://www.banggood.com/custlink/KG3vEvGOIp