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The MIDLAND INDUSTRIES FS680188 is a 90-degree hydraulic elbow adapter designed to connect O-Ring Face Seal (ORFS) and O-Ring Boss (ORB) hydraulic lines in high-pressure fluid power systems. Machined from steel, this adapter features a 1/2 in Male ORFS port on one end and a 1/2 in Male ORB port on the other, with thread sizes of 13/16-16 and 3/4-16. It is rated for up to 6000 psi operating pressure and a maximum temperature of 375 degrees F. The ORB end is adjustable, allowing the technician to orient the elbow before final torque for clean, routed plumbing. This fitting is installed by hydraulic technicians, millwrights, and heavy equipment mechanics working on mobile or industrial hydraulic circuits.
The FS680188 is suited for use in mobile hydraulic systems such as construction equipment, agricultural machinery, and industrial power units where a 90-degree direction change is needed between ORFS and ORB-ported components. It belongs to the FS6801-NWO Series of MORFS to Male Adjustable O-Ring Elbow adapters. Typical applications include pump-to-valve connections, cylinder plumbing, and manifold port transitions in steel hydraulic line assemblies. The compact envelope - 2 inches wide and 1.7 inches long - suits tight routing in equipment bays.
Designed as an OEM-style hydraulic adapter for steel O-Ring Face Seal plumbing applications requiring a 90-degree transition from a Male ORFS connection to a Male Adjustable ORB port in 1/2 in line size.
Installation is performed by qualified hydraulic technicians or mechanics. Depressurize and bleed the hydraulic system completely before removing or installing any fittings. Inspect O-ring seating surfaces for nicks or contamination before assembly, and use a new, properly sized O-ring at the ORB port. Adjust the elbow to the desired orientation before tightening the jam nut to the manufacturer-specified torque; do not over-tighten, as this can damage the O-ring seal.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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