Parker 5 Stx-s Steel Male Branch Tee 5/16 Inch Flare

Product Description

The PARKER 5 STX-S is a steel male branch tee fitting designed for flared tube hydraulic and fluid system connections. It features a 37-degree flare angle with Flare x MNPTF end connections, allowing a branch line to be introduced from a male NPT port while maintaining inline flow. The fitting accepts 5/16-inch tube OD and uses a 1/8-inch NPTF thread standard. Rated to a maximum dynamic working pressure of 6000 psi, this fitting is suited for high-pressure line sets and instrumentation plumbing. Licensed plumbers, HVAC technicians, and fluid power mechanics install this type of fitting in fuel, refrigeration, and hydraulic tubing circuits.

This fitting is used in residential and commercial applications wherever a branch connection is required in a flared steel tubing run. Typical install scenarios include hydraulic control lines, fuel delivery circuits, and refrigeration tubing assemblies where a tee branch must connect to a male pipe thread port. The 37-degree flare angle conforms to SAE-standard flared tubing systems commonly found in OEM and aftermarket fluid power assemblies.

Key Features

• 37-degree flare angle meets SAE flared tubing standards
• Flare x MNPTF end connections allow inline branch introduction at a male pipe thread port
• Rated to 6000 psi maximum dynamic working pressure
• Steel construction for durability in high-pressure fluid and fuel circuits
• NPTF thread standard provides pressure-tight mechanical seal without supplemental sealant
• 5/16-inch tube OD with 1/8-inch thread size suits compact line routing

Compatibility

Designed as an OEM-style replacement or service fitting for steel flared tubing systems using 5/16-inch tube OD and 1/8-inch NPTF male pipe thread connections with a 37-degree flare angle.

Installation Notes

Installation should be performed by a qualified plumber, HVAC technician, or fluid power mechanic familiar with flared tubing systems. Depressurize and isolate the line before removing or installing any fittings. Use a calibrated flaring tool to ensure the tube end meets the 37-degree angle specification before seating the connection. NPTF threads are designed to seal on the threads themselves, but always inspect threads for damage before assembly and follow applicable industry codes such as those referenced in ASME B31 piping standards.