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The MIDLAND INDUSTRIES 64041616 is a straight hydraulic adapter designed to connect a 1-inch Female O-Ring Boss (ORB) port to a 1-inch Male NPTF fitting. Built from steel, it carries a maximum operating pressure of 2300 psi and is rated for temperatures up to 375 degrees F. The thread specifications are 1-5/16-12 on the ORB side and 1-11-1/2 on the NPTF side. This adapter is used by hydraulic technicians and fluid-system mechanics to transition between ORB and NPTF port configurations in high-pressure hydraulic lines. Its straight configuration simplifies inline connections where a direct port-to-port interface is required.
The 64041616 is suited for industrial and mobile hydraulic applications where ORB and NPTF fittings must interface without a flex or angle offset. It fits within hydraulic power units, manifolds, cylinders, and related fluid-power components that use standard SAE and NPTF porting. Typical install environments include agricultural equipment, construction machinery, and industrial hydraulic systems. This adapter belongs to the Midland 6404 Series, which covers Female O-Ring Boss to Male NPT transitions in steel construction.
Part of the Midland 6404 Series, designed for hydraulic systems requiring a Female O-Ring Boss to Male NPTF straight adapter in steel with 1-inch connection sizes on both ends.
Installation should be performed by a qualified hydraulic technician or pipefitter familiar with high-pressure fluid systems. Depressurize and isolate the hydraulic circuit completely before removing or installing any fittings. The NPTF dry-seal thread is designed to seal without tape or compound, but confirm end-use system requirements before applying thread sealant. Torque to the system or equipment manufacturer's specification for the connection size and pressure class.
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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