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The PARKER PS1690103-16-16 is a steel hydraulic hose fitting that connects a male NPT end to a male JIC 37-degree flare end. Both thread ends measure 1 inch in diameter, and the fitting is rated for working pressures up to 5,000 psi. It is designed for use in high-pressure hydraulic plumbing applications where an NPT-threaded port must mate to a JIC flare connection in a single inline adapter. The all-steel construction provides the strength and durability required for demanding hydraulic system environments. Licensed hydraulic technicians and fluid power mechanics install this type of fitting during system assembly and maintenance.
This fitting is suited for industrial and mobile hydraulic systems that use 1-inch hose or tubing lines operating up to 5,000 psi. Typical applications include hydraulic power units, cylinder circuits, and heavy equipment fluid systems where mixed thread standards appear at connection points. The JIC 37-degree flare seat provides a reliable metal-to-metal seal, while the NPT end seals via thread engagement, commonly assisted with thread sealant tape or paste per system requirements.
Designed as an OEM-style hydraulic adapter fitting for high-pressure fluid power systems using 1-inch male NPT and 1-inch male JIC 37-degree flare connections at working pressures up to 5,000 psi.
Installation should be performed by a qualified fluid power technician or hydraulic mechanic. Depressurize and isolate the hydraulic circuit completely before removing or installing any fittings. Apply an appropriate thread sealant to the NPT end per system requirements; the JIC 37-degree flare end relies on a metal-to-metal seat and should not have sealant applied to the flare face. Verify that all connections are torqued and leak-tested before returning the system to service.
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