Parker 42IFHD-4 Brass Inverted Flare Union 1/4 in

Product Description

The PARKER 42IFHD-4 is a brass inverted flare union fitting designed to join two flared tube ends in hydraulic, refrigeration, and fluid-power line assemblies. It accepts a 1/4 inch tube OD with a 7/16-24 UNF thread on both ends, providing a secure, leak-resistant flare-to-flare connection. Rated to 1400 psi maximum working pressure and up to 250 degrees F, this fitting handles the temperature and pressure demands found in mobile equipment, brake lines, and light refrigerant circuits. Plumbers, HVAC technicians, and hydraulic system mechanics install this type of union when a straight inline connection between two inverted-flare tube runs is required.

This fitting is suited for residential and light commercial applications where SAE J51 inverted flare connections are specified. Typical install scenarios include automotive and mobile hydraulic brake lines, low-pressure refrigerant copper tubing runs, and general fluid-transfer plumbing that requires a removable inline union. Its compact overall length of 0.63 inches makes it practical in tight routing spaces. Compliance with SAE J51 and UL listing means it meets recognized industry standards for inverted flare tube fittings.

Key Features

• 1/4 inch tube OD with 7/16-24 UNF thread on both ends for flare x flare connection
• Rated to 1400 psi maximum working pressure
• Rated to 250 degrees F maximum working temperature
• Brass construction for corrosion resistance in fluid and refrigerant service
• Compliant with SAE J51 and UL Listed
• Compact overall length of 0.63 inches for installations with limited clearance

Compatibility

Designed as an OEM-style replacement or new-installation fitting for systems using SAE J51 inverted flare tube connections with 1/4 inch OD tubing and 7/16-24 UNF threaded fittings.

Installation Notes

Installation of inverted flare fittings is typically performed by licensed plumbers, HVAC technicians, or hydraulic system mechanics. Before servicing any line, depressurize the system completely and, where applicable, recover any refrigerant per EPA Section 608 requirements. Ensure tube ends are properly flared to the correct SAE inverted flare angle before assembly, and do not over-tighten the connection, as brass threads can be damaged by excessive torque. Follow applicable SAE, NEC, or system-specific codes for line routing and support.