Parker 8-8-8 Stx-s Steel Male Branch Tee 1/2 in Flare

Product Description

The PARKER 8-8-8 STX-S is a steel male branch tee fitting designed for flared tube connections in high-pressure hydraulic and fluid systems. It features a 37-degree flare angle with Flare x MNPTF end connections, conforming to SAE J514 and ISO 8434-2 standards. Rated for a maximum dynamic working pressure of 6000 psi and a maximum working temperature of 500 degrees F, this fitting is built for demanding industrial, HVAC, and fluid-power applications. The branch tee configuration allows one inline port and one branch port to share a single male NPT threaded outlet, making it a practical solution for system branch-offs without additional fittings. Plumbers, pipefitters, and fluid-system technicians are the primary installers of this type of fitting.

This fitting is suited for use in hydraulic lines, refrigeration systems, fuel systems, and other pressurized tubing assemblies where a 37-degree flare connection to a male NPTF thread is required. The 1/2-inch tube OD and 1/2-inch NPTF thread sizing are common in both light industrial and commercial fluid-power installations. Its steel construction and compliance with SAE 070425 and ISO 8434-2 make it appropriate for environments with elevated temperatures and pressures. It ships individually and can be ordered in single-unit quantities.

Key Features

• 37-degree flare angle with Flare x MNPTF end connections per SAE J514
• Maximum dynamic working pressure of 6000 psi
• Rated to 500 degrees F maximum working temperature
• Steel construction for durability in high-pressure fluid systems
• Compliant with ISO 8434-2, SAE 070425, and SAE J514 standards
• Overall length of 2.66 inches

Compatibility

Designed as an OEM-style replacement or new-installation fitting for pressurized tubing systems requiring a 37-degree flare male branch tee with 1/2-inch tube OD and 1/2-inch NPTF thread connections.

Installation Notes

Installation should be performed by a qualified pipefitter, hydraulic technician, or licensed plumber. Always depressurize and drain the system before removing or installing any fittings. NPTF threads are designed for dry-seal connections, but verify whether thread sealant is required per the system manufacturer's guidance and applicable codes. Do not overtighten flare connections, as this can damage the sealing surface and compromise pressure integrity.