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The PARKER 170C-4-2 is a brass compression tube female elbow fitting designed to connect a 1/4-inch OD tube to a 1/8-27 NPTF female thread port. It provides a 90-degree directional change in tubing runs where space or routing constraints require an angled connection. Built to SAE J-512 standards, it handles working pressures up to 300 psi and operates across a wide temperature range from -65 degrees F to 250 degrees F. This fitting is suited for hydraulic, pneumatic, fuel, and refrigeration line applications. Plumbers, HVAC technicians, and fluid-power mechanics install this type of fitting in both residential and light commercial systems.
The 170C-4-2 is used in applications requiring a reliable tube-to-port elbow connection where a compression fitting is preferred over a flared or soldered joint. Common install scenarios include instrument tubing connections, control line routing, and small-bore fluid circuits in HVAC equipment, compressors, and hydraulic control panels. Its compact elbow geometry suits tight equipment enclosures and panel-mount situations where straight fittings cannot be routed cleanly.
Designed as an OEM-style compression fitting for use with 1/4-inch OD tubing in systems with 1/8-27 NPTF female threaded ports, consistent with SAE J-512 compression fitting applications.
Installation is typically performed by a licensed plumber, HVAC technician, or fluid-power mechanic. Shut off and depressurize the system fully before removing or installing any compression fitting. Verify that the mating port thread form is NPTF and that the tubing OD is 1/4 inch before assembly to prevent cross-threading or leaks. Do not overtighten the compression nut; follow the fitting manufacturer's recommended turn-past-finger-tight procedure for the ferrule type used.
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