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The MIDLAND INDUSTRIES 6405O3224 is a steel hydraulic pipe adapter designed to transition between a 2-inch Male O-Ring Boss (ORB) connection and a 1-1/2-inch Female NPTF thread. It is built for high-pressure hydraulic systems and rated to 1800 psi. The adapter belongs to the 6405 Series, which covers Male O-Ring to Female NPT configurations. Hydraulic technicians and fluid power specialists install this fitting when connecting O-ring face-seal or O-ring boss ports to standard tapered pipe-thread assemblies. The steel construction provides durability in demanding industrial and mobile hydraulic applications.
This adapter is suited for use in hydraulic plumbing circuits where a Male O-Ring Boss port must interface with a Female NPTF pipe thread. Typical installations include mobile equipment, industrial machinery, and hydraulic power units. The fitting accommodates a 32 x 24 hose dash size designation, making it appropriate for larger-diameter hydraulic lines running in high-flow or high-pressure circuits. It is a single-piece adapter requiring no additional fittings or reducers at the transition point.
Designed as an OEM-style hydraulic adapter for systems using 2-inch Male O-Ring Boss ports and 1-1/2-inch Female NPTF pipe connections in steel pipe adapter assemblies.
Installation should be performed by a qualified hydraulic technician or pipefitter. Depressurize and isolate the hydraulic circuit completely before removing or installing any fittings. NPTF threads are self-sealing by design, but confirm thread engagement and inspect for leaks after system repressurization. Refer to applicable fluid power and hydraulic system standards for torque and assembly procedures specific to your system.
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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