The PC4-M6 is a pneumatic push-fit bowden coupler with an M6 thread — the standard fitting for most FDM 3D printers. Push the PTFE tube in to connect, press the collet to release. No tools, no leaks, no filament path gaps. Brass body, stainless steel collet.
Specifications
| Model | PC4-M6 |
| Thread | M6 |
| Tube OD | 4mm (suits standard 4mm OD / 2mm ID PTFE tube) |
| Body Material | Brass |
| Collet Material | Stainless steel |
| Connection Type | Push-fit with quick-release collet |
Compatible Printers
Creality Ender 3, Ender 3 V2, Ender 3 S1
Creality Ender 5, CR-10 & CR-10S series
E3D V6 & Volcano hotends
MK8-style extruder setups
Any printer with an M6-threaded hotend or extruder port
Most bowden-style 3D printers using 4mm OD PTFE tube
Common Questions
How do I install and remove the PTFE tube?
Push the PTFE tube firmly into the collet until it seats fully — the stainless collet grips it automatically. To remove, press down on the collet ring while pulling the tube out. No tools needed.
Why is my filament grinding or jamming near the coupler?
The most common cause is a gap between the end of the PTFE tube and the nozzle. Make sure the tube is seated all the way through the coupler to the nozzle tip, especially on direct-drive setups. Replacing a worn or loose coupler often resolves persistent grinding issues.
What PTFE tube does this fit?
The PC4-M6 accepts standard 4mm OD PTFE tubing, typically 4mm OD / 2mm ID for 1.75mm filament. Ensure your tube is cut cleanly and squarely for the best seal.
Please note: PTFE tube sold separately. Thread is M6 — verify your hotend or extruder port matches before ordering.