Parker 661FHD-4-6 Brass Male to Female Flare Fitting

Product Description

The PARKER 661FHD-4-6 is a brass flare-to-flare reducer fitting designed to connect tubing with different outside diameters in refrigeration, HVAC, and fluid-handling systems. It transitions from a 1/4-inch tube OD male flare end to a 3/8-inch tube OD female flare end using a 45-degree flare angle and a 5/8-18 UNF thread on the female side and a 7/16-20 UNF thread on the reduced male side. The fitting is rated to 1,400 psi maximum working pressure and handles temperatures up to 250 degrees F. Licensed HVAC technicians and refrigeration mechanics typically install this fitting during line set connections, equipment changeouts, or service valve replacements.

This fitting is suited for residential and light commercial HVAC and refrigeration applications where dissimilar tube sizes must be joined using SAE 45-degree flare connections. It is commonly used in copper tubing assemblies for refrigerant lines, fuel gas systems, and hydraulic fluid circuits. The compact 1.2-inch overall length makes it practical for tight service access areas. Compliance with SAE J512, SAE J513, and UL Listing standards confirms it meets recognized industry requirements for flare fittings used in these environments.

Key Features

• 45-degree SAE flare connection on both ends per SAE J512 and SAE J513
• Reduces from 3/8-inch tube OD female flare to 1/4-inch tube OD male flare
• Rated to 1,400 psi maximum working pressure
• Rated to 250 degrees F maximum working temperature
• Brass construction provides corrosion resistance for refrigerant and fluid service
• UL Listed; meets SAE J512 and SAE J513 standards
• Compact overall length of 1.2 inches for tight-access installations

Compatibility

Designed as an OEM-style replacement or new-installation fitting for systems using SAE 45-degree flare tube connections with 1/4-inch and 3/8-inch tube OD copper tubing.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified refrigeration mechanic familiar with SAE flare connections. Recover any refrigerant and depressurize the system before disconnecting or installing flare fittings. Use a properly sized flaring tool to ensure a clean, uniform 45-degree flare seat before assembly. Do not over-torque the flare nut, as brass fittings can crack under excessive force; follow standard SAE J512 assembly practices for torque guidance.