The most durable thread in a 3D printed part is a metal threaded insert, heat-set into a prepared hole. For light loads, the thread can be tapped directly into the plastic; directly printed threads are only suitable for coarse threads (≥M8).
| Method | When |
|---|---|
| Threaded inserts | Screws removed many times, higher loads, M2–M8. |
| Tapping into plastic | Screws rarely removed, low loads. |
| Printed thread | Coarse threads (≥M8), caps, containers. |
A directly printed M3 thread will not be accurate. We recommend an M3 threaded insert or tapping after production.
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