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The PARKER KP81312 is a straight female JIC 37-degree swivel fitting designed for hydraulic hose assemblies. It connects to hose with a 0.625-inch (5/8 inch) inside diameter and uses a 1-1/16-12 threaded end for a secure, leak-resistant joint. Manufactured from steel, this fitting is built to handle the mechanical demands of hydraulic systems in industrial and mobile equipment applications. The swivel design allows the hose end to rotate during installation, reducing torsional stress on the hose and simplifying routing in tight or congested plumbing runs. Hydraulic technicians and fluid power specialists are the primary installers of this fitting type.
This fitting is suited for use in hydraulic systems where JIC 37-degree flare connections are specified. It is commonly installed in mobile equipment, industrial machinery, and high-pressure fluid transfer lines that use compatible Parker hose series. The straight configuration makes it appropriate for inline connections where a direct, non-angled transition between hose and port is required. The 10mm hose size designation aligns with metric sizing conventions used alongside the 0.625-inch ID measurement.
Designed for use with Parker hose series 187 TC, 187 ST, 302, 304, 387 TC, 387 ST, 422, 424, 426, 436, 471TC, 471ST, 472TC, 482TC, 482ST, 487 TC, 487 ST, 722 TC, 722 ST, 787 TC, 787 ST, 797 TC, 797 ST, and 881 hoses with a 5/8-inch (0.625-inch ID) hose diameter.
Installation should be performed by a qualified hydraulic technician or fluid power specialist. Depressurize and isolate the hydraulic circuit completely before disconnecting or assembling any fittings. The swivel end should be held stationary while torquing the threaded connection to avoid introducing twist into the hose. Follow applicable fluid power standards and equipment manufacturer torque guidelines when making up JIC flare connections.
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