Parker 166FSV-6-6 Brass Swivel Nut Flare Elbow 3/8 in

Product Description

The PARKER 166FSV-6-6 is a brass 90-degree swivel nut elbow fitting designed for flared tube connections in refrigeration, HVAC, and fluid system applications. It accepts 3/8-inch tube OD with a 45-degree flare angle and uses a 5/8-18 UNF thread on the swivel end. The fitting is rated to 1000 psi maximum working pressure and handles temperatures up to 250 degrees F, making it suitable for high-pressure refrigerant lines and hydraulic circuits. HVAC technicians and plumbers use this elbow to make a 90-degree directional change in a tubing run while maintaining a leak-free flared connection. The swivel nut design simplifies alignment during assembly without rotating the tubing itself.

This fitting is used in residential and light commercial HVAC systems, refrigeration equipment, and fluid power plumbing where a 90-degree flare elbow is needed to route tubing through tight or angled spaces. It is well suited for copper tubing lines connecting condensers, evaporators, and other refrigerant circuit components. Installers working to SAE J512 and SAE J513 flare standards will find the 166FSV-6-6 a direct fit in those system configurations. The UL-listed rating adds an extra layer of confidence for installations subject to inspection.

Key Features

• 90-degree swivel nut elbow with 45-degree flare angle for directional tubing routing
• 3/8-inch tube OD, Flare x Swivel end connections
• 5/8-18 UNF thread standard
• 1000 psi maximum working pressure rating
• 250 degrees F maximum working temperature
• Meets SAE J512, SAE J513, and UL Listing standards

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 3/8-inch OD flared tube systems conforming to SAE J512 and SAE J513 specifications.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber. Always recover refrigerant and depressurize the system before disconnecting or installing flare fittings. Use a calibrated flaring tool to produce a proper 45-degree flare seat; an improperly formed flare is a leading cause of leaks. Tighten the swivel nut to the fitting body by hand first, then use a flare nut wrench to achieve a snug, leak-free seat without over-torquing the brass threads.