Parker FB5UC5-HBLK Push-to-connect Union 5/16 Inch Od

Product Description

The PARKER FB5UC5-HBLK is a push-to-connect union tube fitting designed for fast, tool-free tube connections in fluid handling and pneumatic systems. Built from Kynar (PVDF) with a black finish, it joins two tube runs at a 5/16 inch outside diameter without threading or compression tools. The FKM o-ring provides a reliable seal across a broad chemical resistance range, making this fitting well suited for aggressive media. Rated to 250 psi and with a vacuum rating of 28 in-Hg, it handles both pressure and vacuum service. Plumbers, industrial technicians, and fluid system installers use this fitting where quick assembly and chemical resistance matter.

This union fitting is used in residential and light commercial fluid, chemical, and pneumatic plumbing systems where Kynar construction is specified for corrosion or chemical resistance. It is a straight union configuration, connecting two lengths of 5/16 inch OD tubing inline. The push-to-connect design speeds up installation in tight panels or manifold assemblies where wrench access is limited. It is commonly found in chemical dosing lines, water treatment systems, and instrumentation tubing runs.

Key Features

• Push-to-connect design allows tool-free tube insertion and removal
• Kynar (PVDF) body provides excellent chemical and corrosion resistance
• FKM o-ring seal rated for aggressive fluid compatibility
• Rated to 250 psi working pressure
• Vacuum rated to 28 in-Hg for dual-service applications
• Straight union configuration joins two 5/16 inch OD tube ends inline

Compatibility

Designed as a push-to-connect union for 5/16 inch outside diameter tubing in systems requiring Kynar wetted materials and FKM seals.

Installation Notes

Installation is performed by qualified plumbing or fluid system technicians. Before servicing any line, depressurize and drain the system completely. Tubing ends must be cut square and deburred before insertion to ensure a full, leak-free seat in the collet. Verify that the tubing OD is within the manufacturer tolerance for the fitting before pressurizing the system.