The file 'T-nut M3 Drop-in Rotating V-Slot 3D Printer Model' is (stl) file type, size is 332.9KB.
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
T-nut_M3_x1.stl | 66.3KB | |
T-nut_M3_x12.stl | 794.6KB | |
T-nut_M3_x6.stl | 397.3KB |