Parker 660FHD-8 Brass Flared Tube Union 1/2 in Female to Female

Product Description

The PARKER 660FHD-8 is a brass flared tube union with female-to-female ends, designed to join two flared tubing runs in a single inline connection. It accepts 1/2-inch OD tubing on both ends using a 45-degree SAE flare seat and a 3/4-16 UNF thread. Rated to 750 psi maximum working pressure and 250 degrees F, this fitting is built for refrigeration, HVAC, and hydraulic tubing systems where a secure, leak-free union is required. Licensed HVAC technicians and refrigeration mechanics are the primary installers. The overall installed length is 1.43 inches, keeping the assembly compact in tight routing situations.

This fitting is used in residential and light commercial HVAC systems, refrigeration lines, and hydraulic tubing assemblies wherever two female flared tube ends must be coupled inline. The 45-degree flare geometry conforms to SAE J512 and SAE J513 standards, making it appropriate for refrigerant line sets, fuel lines, and other tubing circuits that require a rated pressure-bearing union. It carries a UL Listing and suits applications where code-compliant fittings are specified.

Key Features

• Female-to-female flare union joins two 1/2-inch OD flared tube ends inline
• 45-degree SAE flare seat per SAE J512 and SAE J513
• 3/4-16 UNF thread on both ends for secure engagement
• 750 psi maximum working pressure for demanding fluid and refrigerant circuits
• 250 degrees F maximum working temperature
• UL Listed construction; complies with SAE J512, SAE J513
• Compact overall length of 1.43 inches suits tight tubing layouts

Compatibility

Designed as an OEM-style replacement or service fitting for HVAC, refrigeration, and hydraulic tubing systems using 1/2-inch OD tubing with a 45-degree SAE flare and 3/4-16 UNF thread connections.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified mechanic. Depressurize and recover any refrigerant or fluid from the system before disassembling existing fittings. Hand-tighten the flare nuts first to seat the flare cone squarely, then torque with a flare nut wrench to avoid distorting the flare. Verify the system holds pressure before returning it to service.