These drop in t-nuts are special design for the 30x30 extrusions used by Prusa. They should fit other 3030 extrusions too.
I offer versions for M3, M5 and M5 nuts and for M5 also with a build in thread.
Print in the shown orientation. Use 3 or 4 perimeters for strength.
T_Nut_30x30_Prusa_M3_Nut.stl | 33.5KB | |
T_Nut_30x30_Prusa_M4_Nut.stl | 47.3KB | |
T_Nut_30x30_Prusa_M5_Nut.stl | 59.4KB | |
T_Nut_30x30_Prusa_M5_Threaded.stl | 517.8KB |