Parker 4-4 Ftx-s Steel Flared Tube Connector 1/4 in

Product Description

The PARKER 4-4 FTX-S is a steel flared tube connector designed for high-pressure hydraulic and fluid power lines. It joins a 1/4-inch OD flared tube to a 1/4-inch male NPTF thread, using a 37-degree flare seat conforming to SAE J514 and ISO 8434-2. Rated to 6,000 psi maximum working pressure and 500 degrees F, this fitting handles demanding service conditions in industrial and mobile equipment applications. It is typically installed by hydraulic technicians, pipefitters, and HVAC-R mechanics wherever a leak-free metal-to-metal flare connection is required.

This connector suits residential and commercial fluid systems where 37-degree SAE flare connections are specified. Common applications include hydraulic lines, fuel supply circuits, refrigeration tubing, and instrumentation plumbing. The NPTF thread provides a dry-seal mechanical fit without relying solely on thread sealant. Sold individually, it is a direct-install component requiring no additional hardware beyond the mating fitting and a properly flared tube end.

Key Features

• 37-degree SAE flare seat per SAE J514 and ISO 8434-2 for a metal-to-metal seal
• 6,000 psi maximum dynamic working pressure
• Rated to 500 degrees F (260 degrees C) for high-temperature service
• NPTF dry-seal male thread eliminates reliance on thread tape alone
• Steel construction for strength and durability in hydraulic and fuel service
• Compact overall length of 1.42 inches for tight plumbing layouts

Compatibility

Designed as an OEM-style replacement or new-install connector for systems using 1/4-inch OD 37-degree SAE flare tubing with 1/4-inch NPTF male port connections, conforming to SAE J514 and ISO 8434-2 standards.

Installation Notes

Installation should be performed by a qualified pipefitter, hydraulic technician, or licensed mechanic familiar with SAE flare fittings and NPTF thread engagement. Depressurize and drain the line completely before removing any existing fitting. Verify the tube end is properly flared to 37 degrees with no cracks or tool marks before assembly, as a damaged flare is the most common source of leaks at this connection type. Torque to the system manufacturer's specification for the fitting size and material; do not over-torque steel fittings into cast or aluminum ports.