PTFE Tube Filament Feed Fittings for 3D Printers - 4mm Bore Pneumatic Couplers (M3, M5, M6 Thread Options)

Smooth, reliable filament feeding for Bowden and direct-drive setups. These pneumatic feed fittings secure 4 mm PTFE tubing for consistent filament movement, easy installation, and quick maintenance. Ideal for 3D printer extruders, hotend guides, and filament feed systems.

Specifications:

• Item Type: Pneumatic Connectors
• Compatible Tube Bore: 4 mm (0.16 in)
• Thread Sizes: 3 mm (≈0.12 in), 6 mm (≈0.24 in), 10 mm (≈0.39 in)
• Height (example fitting): 18.5 mm (0.73 in)
• Materials: Copper, stainless steel, metal and plastic components
• Colors: Blue, Black
• Use: Filament feed coupler for PTFE tube on 3D printers, compatible with Bowden and PTFE-lined hotend setups
• Installation: Connect by threading the quick fitting into the mating port
• Removal: Press and hold the blue or black collet end and pull out the PTFE tube

Why choose these fittings? These pneumatic couplers offer a secure grip on 4 mm PTFE tubing, low-friction filament path, and fast push-fit installation for maintenance or upgrades. Durable metal and plastic construction ensures reliable performance in everyday 3D printing use.

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