Parker FB5BU5-HBLK Bulkhead Union Fitting 5/16 Inch Od

Product Description

The PARKER FB5BU5-HBLK is a push-to-connect bulkhead union tube fitting designed to pass tubing through a panel or bulkhead and create a secure, leak-resistant connection on both sides. Constructed from Kynar (PVDF) with a black finish, this fitting handles up to 250 psi working pressure and carries a vacuum rating of 28 inches Hg, making it suitable for both pressure and vacuum service. The FKM O-ring seat provides reliable sealing compatibility with a range of fluid media. Licensed plumbers, HVAC technicians, and fluid system technicians install this type of fitting in instrumentation, chemical handling, and pneumatic or liquid distribution lines.

This bulkhead union is suited for residential and light commercial applications where tubing must pass cleanly through an enclosure wall, panel, or bulkhead. The 5/16 inch OD push-to-connect design allows fast, tool-free tube insertion and secure retention without ferrules or threaded sleeves. Its Kynar body offers strong resistance to aggressive chemicals and UV exposure, making it appropriate for chemical feed systems, pool and water treatment equipment, and similar fluid handling environments where corrosion resistance is a priority.

Key Features

• Push-to-connect design accepts 5/16 inch OD tubing — no tools required for tube insertion
• Kynar (PVDF) body provides excellent chemical and UV resistance
• FKM O-ring sealing material compatible with a broad range of process fluids
• Rated to 250 psi working pressure
• Vacuum rated to 28 inches Hg for suction-side service
• Black color finish for easy visual identification in multi-line systems

Compatibility

Designed as an OEM-style push-to-connect bulkhead fitting for systems using 5/16 inch OD tubing in pneumatic, liquid, or chemical distribution applications.

Installation Notes

Installation of bulkhead union fittings typically falls to licensed plumbers or instrumentation technicians working on fluid or pneumatic systems. Before servicing any line, depressurize and isolate the system completely. Ensure the panel or bulkhead material is compatible with the fitting body dimensions and that the mounting hole diameter matches the fitting specifications. Follow all applicable plumbing and pneumatic codes for the jurisdiction and application.