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The PARKER 0588-20-20 is a male SAE straight thread hydraulic hose fitting with an O-ring face seal, designed for rigid, leak-resistant connections in high-pressure hydraulic systems. Manufactured from steel, this Series 88 fitting features a 1.25-inch inside diameter, a 1-5/8-12 thread size, and an overall length of 2.59 inches. The O-ring provides a positive, pressure-tight seal at the connection interface, reducing the risk of leakage under dynamic system loads. This fitting is installed by hydraulic system technicians and mobile equipment mechanics working on industrial and mobile hydraulic circuits.
This fitting is suited for use in industrial machinery, mobile equipment, and hydraulic power units requiring reliable hose-to-port connections. PARKER specifies compatibility with 811, 811HT, and 881 hose series, making it appropriate for high-pressure hydraulic plumbing where a straight, rigid male SAE connection is required at the hose end. Its straight configuration simplifies routing in applications where a direct axial connection to a hydraulic port is practical.
Specified for use with Parker 811, 811HT, and 881 hydraulic hose series with a 1.25-inch inside diameter and 20 mm hose size designation.
Installation should be performed by a qualified hydraulic technician. Depressurize and isolate the hydraulic circuit fully before removing or installing any fitting. Inspect the O-ring for damage before assembly and ensure the mating port face is clean and free of nicks or burrs that could compromise the seal. Torque the fitting to the hydraulic system manufacturer's specification for the thread size and do not exceed rated working pressure for the hose and fitting assembly.
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