Parker 6-4 F5OX-S Steel Flare Tube Connector 3/8 in

Product Description

The PARKER 6-4 F5OX-S is a steel flared tube straight thread connector designed to join 3/8 inch OD flared tubing to SAE O-ring boss (ORB) ports. It uses a 37-degree flare seat on the tube end and a straight UNF thread with an O-ring seal on the port end. This fitting is built for hydraulic and fluid power lines where leak-free performance under high pressure is required. It is rated for a maximum working pressure of 6000 psi dynamic and handles temperatures up to 500 degrees F. Plumbers, hydraulic technicians, and fluid system assemblers install this type of fitting in equipment plumbing, mobile hydraulics, and industrial fluid circuits.

This connector suits hydraulic systems, lubrication lines, fuel systems, and general fluid power plumbing where a 37-degree flare tube meets an SAE O-ring boss port. It is appropriate for both stationary industrial equipment and mobile machinery applications. The straight thread plus O-ring face seal on the port end eliminates the leak paths common with tapered pipe threads, making it a preferred choice in high-cycle or high-vibration environments. The compact overall length of 1.27 inches makes it suitable for tight plumbing runs.

Key Features

• 37-degree flare seat conforms to SAE J514 and ISO 8434-2 standards for reliable tube sealing
• SAE O-ring boss (ORB) straight thread port end eliminates taper-thread leak paths
• Rated to 6000 psi maximum dynamic working pressure
• Steel construction handles temperatures up to 500 degrees F
• Compact 1.27 inch overall length suits tight installation spaces
• Meets ISO 8434-2 and SAE J514 standards

Compatibility

Designed as an OEM-style replacement fitting for hydraulic and fluid power systems requiring a 3/8 inch OD 37-degree flare tube connection to a 7/16 inch UNF SAE O-ring boss port.

Installation Notes

Installation should be performed by a qualified hydraulic technician or pipefitter. Depressurize and isolate the hydraulic or fluid circuit fully before removing or installing any fitting. Inspect the flare seat and O-ring sealing surface for nicks or contamination before assembly. Torque to the fitting manufacturer or equipment OEM specification using a calibrated torque wrench; do not rely on feel alone in high-pressure circuits.