Parker 4 Stx-s Steel Flared Male Branch Tee 1/4 in

Product Description

The PARKER 4 STX-S is a steel male branch tee fitting designed for flared tube connections in high-pressure hydraulic and fluid power systems. It accepts a 1/4-inch tube OD with a 37-degree flare angle on the tube ends and uses a 1/8-inch NPTF male thread on the branch port. Rated to 6,000 psi maximum working pressure dynamic and capable of handling temperatures up to 500 degrees F, this fitting is built for demanding service conditions. Licensed plumbers, pipefitters, and hydraulic technicians install this fitting where a branch connection is needed in a flared-tube line.

This fitting is suited for use in hydraulic lines, fuel systems, instrumentation tubing, and compressed air applications that require a reliable branch-tee configuration. The Flare x MNPTF end connection makes it compatible with standard 37-degree flared tube assemblies on two ports and a male NPTF threaded branch port. It conforms to ISO 8434-2, SAE 070425, and SAE J514, making it appropriate for OEM equipment builds and field repair work across industrial, mobile equipment, and fluid-handling installations.

Key Features

• 37-degree flare angle meets SAE J514 and ISO 8434-2 standards
• 6,000 psi maximum dynamic working pressure for high-pressure applications
• Temperature rated to 500 degrees F (260 degrees C)
• 1/8-inch NPTF male branch thread provides a dry-seal connection
• Steel construction for durability in hydraulic and fluid power environments
• Overall length of 1.78 inches for compact installation in tight plumbing runs

Compatibility

Designed as an OEM-style replacement or field-fit component for hydraulic and fluid power systems using 37-degree flared tube connections with 1/4-inch tube OD and 1/8-inch NPTF threaded branch ports, per SAE J514 and ISO 8434-2 specifications.

Installation Notes

This fitting is installed by licensed pipefitters, hydraulic technicians, or qualified plumbers working on pressurized fluid systems. Always depressurize and isolate the line before disassembling or installing any flared fitting. Ensure the tube end is properly flared to a 37-degree angle using the correct flaring tool before assembly to achieve a leak-free seal. Refer to SAE J514 torque guidelines and applicable local codes for proper assembly procedure.