Parker FB4FC4-HBLK Push-to-connect Fitting 1/4 in Kynar

Product Description

The PARKER FB4FC4-HBLK is a push-to-connect tube fitting connector designed for quick, tool-free tube connections in fluid and pneumatic system lines. Built from Kynar (PVDF) with a black finish, this connector handles tubing with a 1/4 inch outside diameter and threads into 1/4 inch NPTF ports. It is rated to 250 psi and carries a vacuum rating of 28 in-Hg, making it suitable for both pressure and vacuum service. FKM O-rings provide chemical resistance across a broad range of media. Plumbers, HVAC technicians, and instrumentation professionals install this fitting where reliable, corrosion-resistant connections are required in tight service environments.

This connector is suited for residential and light commercial applications involving chemical fluid handling, instrumentation tubing, pneumatic control lines, and similar systems where Kynar material compatibility is specified. The NPTF thread type ensures a pressure-tight mechanical seal without the need for additional thread sealant in many installations. Its compact form factor makes it practical in panel-mount and equipment-bay plumbing scenarios where straight inline connections are needed.

Key Features

• Push-to-connect design allows fast, tool-free tube insertion and release
• Kynar (PVDF) body construction provides strong chemical and UV resistance
• FKM O-ring material compatible with a wide range of aggressive media
• Rated to 250 psi operating pressure
• Vacuum rated to 28 in-Hg for vacuum service applications
• 1/4 inch NPTF thread delivers a pressure-tight mechanical connection

Compatibility

Designed for use with 1/4 inch OD tubing in systems with 1/4 inch NPTF threaded ports. Suitable as a direct replacement or new-installation connector in pneumatic, instrumentation, and chemical fluid lines requiring Kynar-compatible fittings.

Installation Notes

Depressurize and isolate the system fully before removing or installing any push-to-connect fitting. Ensure tubing is cut squarely and deburred before insertion to achieve a proper seal. NPTF threads are designed for mechanical pressure-tight engagement, but consult system specifications regarding thread sealant requirements. Installation should comply with applicable local plumbing or pneumatic system codes and be performed by a qualified tradesperson.