PC4-M6 Pneumatic Connector & PTFE Tube | 3D Printer Dryer Box

PC4-M6 Pneumatic Straight Connector & PTFE Tube — 3D Printer Filament Dryer Box Accessories

Keep your 3D printer's filament feed system running smoothly with this high-quality PC4-M6 Pneumatic Straight Connector paired with a 4×2.5mm PTFE Tube. Designed specifically as a replacement or upgrade accessory for filament dryer boxes, this metal-and-rubber fitting ensures a secure, airtight connection between your dryer and printer — helping maintain consistent filament flow and reducing the risk of jams or moisture-related print failures.

Whether you're setting up a new filament drying station or replacing worn fittings, these couplers deliver reliable performance and are compatible with standard M6-threaded ports found on most popular filament dryer boxes and extruder assemblies.

Key Features

• Thread Size: M6 — fits standard PC4-M6 push-fit pneumatic ports
• PTFE Tube Dimensions: 4mm OD × 2.5mm ID — provides smooth, low-friction filament passage
• Material: Durable metal body with rubber sealing for a leak-free, secure connection
• Quick-Connect Design: Tool-free push-in installation for fast setup and easy tube changes
• Pack Options: Available in 1-piece or 4-piece sets to suit your needs
• Versatile Compatibility: Ideal for filament dryer boxes, Bowden-style extruder setups, and PTFE tube routing
• Made in Mainland China

What's in the Box

• 1 or 4 × PC4-M6 Pneumatic Straight Connector with PTFE Tube (as selected)

Compatible Uses

• Filament dryer box feed port connections
• Bowden extruder tube fittings
• PTFE tube routing and repairs on FDM 3D printers

Please Note

• Sizes are based on manufacturer measurements; please allow ±5–10mm tolerance.
• Colors may vary slightly due to monitor settings and lighting conditions.
• Product images are for reference only; refer to the description for exact sizing details.

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For general guidance on safe handling of plastic materials and fittings, visit the U.S. Consumer Product Safety Commission (CPSC).

Learn more: Aventics

Frequently Asked Questions

Q: What thread size does the PC4-M6 connector use and what printers is it compatible with?

A: The PC4-M6 pneumatic straight connector uses a standard M6 thread, making it compatible with a wide range of FDM 3D printers that use Bowden-style extruders and most filament dryer boxes equipped with M6-threaded feed ports — including popular brands and models across the hobby and enthusiast market.

Q: What is the inner and outer diameter of the included PTFE tube?

A: The included PTFE tube measures 4mm outer diameter (OD) and 2.5mm inner diameter (ID). This size is suited for standard 1.75mm filament, ensuring low-friction, smooth passage of filament from your dryer box to the extruder.

Q: Do I need any tools to install the PC4-M6 connector?

A: No special tools are required. The PC4-M6 features a push-in quick-connect design — simply push the PTFE tube into the fitting until it clicks into place. To remove, press the collet ring down while pulling the tube out gently.

Q: Can I buy multiple pieces for a multi-printer or multi-spool setup?

A: Yes! This listing is available in a 1-piece or 4-piece pack, making it easy to stock up for multiple printers or dryer boxes. The 4-piece set offers better value for enthusiasts running larger setups.