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The PARKER PP-00313 is a male O-ring face seal (ORFS) swivel fitting designed for use in hydraulic hose assemblies. It features a straight shape with a 0.375-inch inside diameter, a 1/2-inch thread size, and a Seal-Lok shaft type that provides a positive, leak-resistant face seal connection. Constructed from steel, this fitting is suited for the demanding pressure and vibration conditions common in mobile and industrial hydraulic systems. An overall length of 2.2 inches keeps the assembly compact. It is typically installed by hydraulic technicians and maintenance mechanics assembling or repairing hose lines on equipment and machinery.
This fitting is designed for hose assembly applications across a wide range of Parker hydraulic hose series in sizes corresponding to a 3/8-inch (6 mm) hose diameter. It is used in both mobile equipment and stationary industrial hydraulic systems where a reliable, face-seal threaded connection is required. The swivel design allows the hose to be positioned without twisting during installation, which simplifies routing in tight spaces. Each package contains 4 fittings with a minimum order quantity of 1.
Compatible with Parker 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 hydraulic hoses in the 3/8-inch (6 mm) hose size. Part of Parker Series 43 fittings.
Installation should be performed by a qualified hydraulic technician. Depressurize and isolate the hydraulic circuit fully before disconnecting or assembling any hose or fitting. Inspect the O-ring face seal surface for nicks or contamination before assembly, and ensure the O-ring is properly seated to achieve a leak-free connection. Follow SAE J516 torque guidelines and the equipment manufacturer's service procedures when tightening threaded fittings.
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