BIQU PC4-M10 Pneumatic Connector Fittings Bowden Tube Coupler Male Straight PTFE Tube Push for E3D-V6 Bowden Extruder 3D Printer (Pack of 10pcs)

Exactly what I needed and wanted, that is a 4mm fitting with a 1/8 British Standard Pipe Thread. The title description says M10 and for pipe the pitch is usually 1 mm but these are not. For 3D printers one of the most popular threads is 1/8 BSPT/ISO 7-1. Between the positive reviews of success and a reviewer claiming that its not really an M10, I bet against the description and bought it anyway: success! The M10 in the description is wrong, but the flats do suit a 10 mm wrench. Usage Tip: These grip some PTFE tubing a bit too well for my taste. One thing about PTFE is that is cold-flows with force and time so once it gets stuck it never comes out. Ive been taming that death-grip by running a needle file through them.

This products photos are misleading - they clearly show the fitting as having a beveled and tight interior edge, yet the fittings that arrived have an open interior Thats an issue, as the open interior allows the PTFE tube to move more freely. More movement directly leads to a shorter lifespan of the fitting and can also cause issues with filament loading We run a printer shop with twelve printers running continuously and I need parts that are dependable, not fittings that will wear out over the span of twenty hours of printing Please either update your listing photos or start sending out fittings with beveled edges. As it is, i can only recommend these as a cheap and temporary fix

I ordered these because I needed them quickly. I was a little concerned about the quality because of the really low price compared to my normal source. I didn’t need to be concerned. These are very nicely made and every bit as good as my normal source. I may continue to use my normal source out of loyalty since they have provided me with other services as well as parts, but in a pinch I won’t hesitate to buy these again.

I have replaced every connection point for Bowden tubing on my Ender 3 V2 with these connectors because there is no issues with travel at all. I even went as far as to mill out and thread a larger hole on my all metal hot end and extruder housing to be able to fit these. Running 2mm retraction settings on a dual gear Bowden feeder flawlessly.

Setting up 5 color 3d printing was a bit of a challenge until I saw a mod that suggested using these in place of the clamps that were specified. This was a much better option. They grasp the PTFE tubing perfectly and hold it while also allowing easy removal.

I used these to convert the plate holder for the tubes on my mk3s with mmu2s. I printed the part from thingiverse and these screwed right in no problem and work like a charm.

Used to replace bowden tube holder on Creality CR10S Pro 3d printer. Direct replacement fit with no issues.

The item does not match the photos. I specifically purchased these because I thought the bottom was flat, not recessed.

These connector are not of a standard size or thread pitch. If youre intending to mate these to standard metric hardware, youll have issues. If its your intent to use these as a custom fit, they may very well work for you, just dont expect to find nuts or threaded receptacles that will accept them.

The input end of the Endor 3 takes a 4mm thread, not the 10mm thread on these.