Tapered thread bowden coupling PC4-M6 (with original coupling insert)

This tapered thread bowden coupling is made to improve the original one (made in brass with weak grip) by putting a case on it. The clamp holding it is tapered and is originally created by krtektm.
Original: https://www.thingiverse.com/thing:1993384

The M6 thread can be tightened really good.

NEW VERSION: https://www.thingiverse.com/thing:3837897