Parker FB5TMC4 Tube Stem Adapter 5/16 X 1/4 in Od Kynar

Product Description

The PARKER FB5TMC4 is a push-to-connect tube stem adapter designed to join tubing with differing outside diameters in fluid and pneumatic line applications. Built from Kynar (PVDF), this fitting handles a maximum working pressure of 230 psi and provides a secure, tool-free connection. The push-to-connect mechanism allows fast field installation without ferrules, compression nuts, or thread sealant. It is suited for use by plumbers, HVAC technicians, and industrial service professionals working with small-bore tubing in corrosive or high-purity fluid environments where Kynar material compatibility is required.

This adapter is used in applications requiring a transition between 5/16 inch and 1/4 inch OD tubing runs. Typical install scenarios include chemical feed lines, refrigerant-compatible instrument lines, laboratory fluid distribution, and light industrial pneumatic systems. The Kynar construction makes it appropriate for environments where chemical resistance or purity standards rule out brass or standard thermoplastic fittings. Sold individually, it is a direct grab-and-go replacement or new-installation component for small-bore tubing systems.

Key Features

• Kynar (PVDF) construction offers strong chemical resistance for corrosive fluid and high-purity applications
• Rated to 230 psi maximum working pressure
• Push-to-connect design allows fast, tool-free tube insertion and secure locking
• Adapts 5/16 inch OD tubing to 1/4 inch OD tubing in a single fitting
• Compact form factor with a footprint of approximately 1.67 x 0.69 x 1.67 inches

Compatibility

Designed as an OEM-style push-to-connect replacement or new-installation fitting for small-bore tubing systems requiring a 5/16 inch to 1/4 inch OD tube stem adapter in Kynar-compatible fluid or pneumatic lines.

Installation Notes

Installation is typically performed by a licensed plumber, HVAC technician, or qualified industrial service technician. Before servicing any fluid or pneumatic line, depressurize the system completely and verify zero pressure before handling fittings. Ensure tubing ends are cut cleanly and squarely with a proper tube cutter to guarantee a leak-free push-to-connect seal. Refer to applicable plumbing codes and the system manufacturer guidelines for pressure and temperature ratings before placing this fitting in service.