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The PARKER PP-00339 is a male SAE 37-degree JIC rigid hydraulic hose fitting machined from steel. It is designed to terminate a 3/8-inch hydraulic hose to a 3/4-16 UNF male JIC thread connection. The rigid body style provides a fixed, non-swivel joint suited for installations where hose routing is set and movement at the fitting end is not required. Hydraulic technicians and fluid-power mechanics install this fitting when assembling or repairing medium-pressure hydraulic lines in mobile equipment, industrial machinery, and other hydraulic circuit applications.
This fitting is suited for use in hydraulic systems that call for 37-degree flare JIC connections, which are among the most widely used thread-and-flare standards in North American fluid-power work. It is a direct-assembly component, meaning it is pressed or crimped onto a compatible 3/8-inch hose using the appropriate hose-end tooling. Typical installations include mobile hydraulic lines on construction and agricultural equipment as well as stationary industrial circuits where positive, leak-resistant metal-to-metal flare sealing is required.
Designed as an OEM-style hydraulic hose end fitting for 3/8-inch hydraulic hose assemblies requiring a male SAE 37-degree JIC rigid end with 3/4-16 UNF thread.
Installation should be performed by a qualified fluid-power technician or hydraulic hose fabricator using the correct hose-end crimping or assembly tooling specified for this fitting series. Depressurize and isolate the hydraulic circuit completely before removing or installing any fitting, and verify the system is at zero pressure before tightening connections. Confirm hose inside diameter and hose series compatibility before assembly, as mismatched components can result in joint failure. Inspect the 37-degree flare seat for nicks or contamination before making up the connection to ensure a proper metal-to-metal seal.
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