Midland Industries FS6400O64 Straight Adapter Orfs Orb

Product Description

The MIDLAND INDUSTRIES FS6400O64 is a straight hydraulic adapter that transitions from a 3/8-inch Male O-Ring Face Seal (ORFS) connection to a 1/4-inch Male O-Ring Boss (ORB) connection. Machined from steel, it is rated for up to 6000 psi maximum operating pressure and a maximum temperature of 375 degrees F. This fitting is part of the FS6400 Series and is designed for use in high-pressure hydraulic plumbing where a leak-free transition between ORFS and ORB ports is required. Hydraulic technicians and fluid power specialists are the primary installers of this type of adapter.

This adapter is suited for industrial and mobile hydraulic systems where a straight inline connection between ORFS and ORB fittings is needed. Typical applications include hydraulic manifolds, cylinders, pumps, motors, and valve bodies that use ORB ports. The ORFS end provides a face-seal connection that minimizes the risk of leakage under high-pressure cycling conditions. It is appropriate for both new installations and service replacements in steel hydraulic line assemblies.

Key Features

• Straight adapter design for inline ORFS-to-ORB transitions without additional bends or offsets
• 6000 psi maximum operating pressure rating for demanding hydraulic circuits
• Rated to 375 degrees F for use in elevated-temperature hydraulic systems
• Thread sizes: 11/16-16 (ORFS end) x 7/16-20 (ORB end)
• Steel construction for durability in industrial and mobile equipment environments

Compatibility

Designed as an OEM-style replacement or new-installation fitting for steel hydraulic systems requiring a 3/8-inch Male O-Ring Face Seal to 1/4-inch Male O-Ring Boss straight adapter connection.

Installation Notes

Installation should be performed by a qualified hydraulic technician. Depressurize and isolate the hydraulic circuit fully before removing or installing any fittings. Ensure O-ring seals are properly seated and in good condition before torquing connections. Do not exceed the rated operating pressure or temperature for this fitting.