Parker 661FHD-10-8 Brass Male to Female Flare Fitting

Product Description

The PARKER 661FHD-10-8 is a brass flared tube fitting that connects a male flare end to a female flare end in a single inline union. It accommodates a 5/8 inch tube OD on one side and a 1/2 inch tube OD on the other, making it a reducing flare fitting. The 45-degree flare angle conforms to SAE J512 and SAE J513 standards, and the primary thread is 3/4-16 UNF. Rated to 750 psi maximum working pressure and up to 250 degrees F, this fitting is suited for refrigerant, fuel, and hydraulic line applications where a reliable, leak-resistant metal-to-metal seal is required. HVAC technicians and plumbers install this fitting when routing or repairing flared tubing runs.

This fitting is used in residential and light commercial HVAC systems, refrigeration lines, and fuel system plumbing where 45-degree SAE flare connections are the standard. The reducing geometry allows a technician to transition between two different tube sizes within the same flared-tube circuit without adding additional adapters. It is sold individually and is appropriate for new installations as well as service and repair work on existing flared-tube systems.

Key Features

• Reduces from 5/8 inch to 1/2 inch tube OD in a single fitting
• 45-degree flare angle meets SAE J512 and SAE J513 standards
• Primary thread size 3/4-16 UNF with reduced thread size 7/8-14
• 750 psi maximum working pressure for high-integrity flare seals
• Rated to 250 degrees F maximum working temperature
• Brass construction resists corrosion in refrigerant and fuel service
• UL Listed

Compatibility

Designed as an OEM-style replacement or service fitting for systems using 45-degree SAE flare connections on copper or brass tubing per SAE J512 and SAE J513 specifications.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber. Depressurize and recover any refrigerant or drain fuel lines completely before disconnecting existing fittings. Inspect flare seats on both the tubing and fitting for nicks or deformation before assembly. Tighten flare nuts to the fitting by hand first, then use a flare nut wrench to avoid distorting the flare seat — do not over-tighten brass fittings.