Midland Industries FS6400O68 Straight Hydraulic Adapter

Product Description

The MIDLAND INDUSTRIES FS6400O68 is a straight hydraulic adapter that connects a 3/8-inch Male O-Ring Face Seal (ORFS) port to a 1/2-inch Male O-Ring Boss (ORB) port in a single inline fitting. Manufactured from steel, it is rated for a maximum operating pressure of 6000 psi and a maximum operating temperature of 375 degrees F. Thread sizes are 11/16-16 on the ORFS end and 3/4-16 on the ORB end. This fitting is used in high-pressure hydraulic plumbing where two different port standards must be joined without adapting to a third fitting or fabricating a custom line. Installation is performed by hydraulic technicians and fluid-power mechanics.

The FS6400O68 belongs to the FS6400 Series of Male ORFS to Male ORB adapters. It is suited for use in mobile hydraulic equipment, industrial hydraulic circuits, and any high-pressure fluid-power system where a leak-free transition between ORFS and ORB port standards is required. The steel construction makes it appropriate for demanding environments where pressure spikes, vibration, and elevated temperatures are common service conditions.

Key Features

• Straight inline design connects 3/8 in Male ORFS to 1/2 in Male ORB in one fitting
• Rated to 6000 psi maximum operating pressure for high-pressure hydraulic circuits
• Rated to 375 degrees F maximum operating temperature
• Steel construction for durability in mobile and industrial hydraulic applications
• Thread sizes: 11/16-16 (ORFS end) and 3/4-16 (ORB end)
• Part of the FS6400 Series Male ORFS to Male ORB adapter family

Compatibility

Designed for use in hydraulic systems requiring a Male O-Ring Face Seal to Male O-Ring Boss port transition. Suitable for mobile equipment and industrial hydraulic circuits operating within the rated pressure and temperature limits of this fitting.

Installation Notes

Installation is typically performed by a qualified hydraulic technician or fluid-power mechanic. Depressurize and bleed down the hydraulic system completely before removing any fittings or lines. Ensure both mating port surfaces are clean and free of damage before assembly, and inspect O-rings for nicks or deformation prior to installation. Follow the equipment manufacturer and applicable industry standards for fitting assembly, torque procedures, and hydraulic line reconnection.