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.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

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