A clamp to stop the ptfe from movement during retraction due to the ptfe fitting lock moving in and out of fitting.
there have been 3 edits since initial release, lengthened the lock collor relief, increased its outer diameter clearance, and then the nut pockets were made large as with variation of mfg some were too tight breaking the part.

Creality

Ender 5

No

No

0.2

20%

Any material does the trick.

This uses a 3mm cap screw 8mm long or longer, with a 3mm nut that should be a light press fit into the retention pocket on one half of the part. in testing so print either with mating surfaces to the bed or fat end to bed, not sure which will net the best results for the clamp serrations yet.