Parker GBMT-668 Compression Male Branch Tee 3/8 in

Product Description

The PARKER GBMT-668 is a compression-style male branch tee fitting designed for tubing with a 3/8-inch outside diameter. It is constructed from Perfluoroalkoxy (PFA) and Polytetrafluoroethylene (PTFE), two fluoropolymer materials chosen for their resistance to aggressive chemicals, high-purity fluid compatibility, and broad temperature tolerance. The fitting uses a plastic grip-type compression mechanism that creates a secure, leak-resistant seal without soldering or adhesives. This fitting is used in fluid-handling systems where chemical resistance and cleanliness are critical requirements. Plumbers, process piping technicians, and specialty fluid-system installers are the typical trades working with this component.

The GBMT-668 is suited for use in laboratory fluid distribution, chemical process lines, high-purity water systems, and semiconductor or pharmaceutical tubing assemblies where fluoropolymer material compatibility is required. The branch tee configuration allows a main tubing run to be tapped at a perpendicular branch connection, all at the same 3/8-inch tube OD size. It is sold individually and is appropriate for both new installations and replacement work in systems that specify PFA or PTFE wetted surfaces.

Key Features

• PFA and PTFE construction provides excellent resistance to corrosive chemicals and high-purity fluid compatibility
• Compression-style fitting requires no soldering, cementing, or special tooling for assembly
• Male branch tee configuration supports a perpendicular branch off a main tubing run
• Plastic grip-type compression mechanism secures 3/8-inch OD tubing reliably
• Lightweight at 0.1 pounds, suited for compact or weight-sensitive installations

Compatibility

Designed for use with 3/8-inch outside diameter tubing in compression-fit fluoropolymer tubing systems. No specific system or model compatibility was provided in the product data.

Installation Notes

Installation is typically performed by plumbers or process piping technicians familiar with fluoropolymer compression fittings. Depressurize and drain the line completely before disassembly or installation. Hand-tighten the compression nut first, then apply a modest additional turn with a wrench — avoid overtightening, as PFA and PTFE components are softer than metal and can be damaged by excessive torque. Consult applicable plumbing codes and the system design specifications for pressure and temperature ratings before placing the fitting in service.