Parker 42IFHD-2 Brass Inverted Flare Union 1/8 in Tube Od

Product Description

The PARKER 42IFHD-2 is a brass inverted flare union fitting designed to join two flared tube ends in hydraulic, refrigeration, and fluid-control line applications. It features a 1/8 inch tube OD with 5/16-28 UNF threads on both ends, providing a secure flare-to-flare connection rated for up to 2800 psi working pressure and temperatures up to 250 degrees F. The brass construction resists corrosion and handles the mechanical stress of high-pressure line connections. Licensed HVAC technicians, plumbers, and hydraulic system technicians use this fitting during line assembly and repair work where an inline union connection is required.

This fitting is suited for residential and light commercial refrigeration line sets, hydraulic tubing assemblies, and other fluid systems requiring an inverted flare union joint. It is commonly installed in brake line systems, HVAC refrigerant circuits, and hydraulic control lines where a removable, pressure-rated inline connection is needed. The compact 0.6 inch overall length makes it practical in tight spaces or panel-mount plumbing configurations. The 5/16-28 UNF thread size conforms to SAE J51 standards, making it a direct-fit option in systems engineered to that specification.

Key Features

• Inverted flare union configuration with flare x flare end connections on both sides
• Rated to 2800 psi maximum working pressure for high-pressure line applications
• Temperature rating up to 250 degrees F (121 degrees C)
• 5/16-28 UNF thread size conforming to SAE J51 standard
• Brass construction for corrosion resistance in fluid and refrigerant service
• UL Listed and SAE J51 compliant

Compatibility

Designed as an OEM-style inverted flare union replacement for hydraulic, refrigerant, and fluid-control tubing systems using 1/8 inch OD tube with 5/16-28 UNF inverted flare connections per SAE J51.

Installation Notes

Installation should be performed by a qualified HVAC technician, hydraulic system technician, or licensed plumber. Depressurize and isolate the line completely before disconnecting or installing any flare fitting. Use a properly calibrated flaring tool to ensure the tube end meets SAE J51 flare geometry before tightening — an improperly flared seat is the leading cause of leaks at inverted flare connections. Do not overtighten; snug the fitting to seat the flare and follow applicable SAE or system manufacturer torque guidance for the fitting size.