Parker 166FSV-12-12 Brass 90 Deg Swivel Nut Elbow 3/4 in

Product Description

The PARKER 166FSV-12-12 is a 90-degree swivel nut elbow fitting machined from brass, designed to connect flared tubing lines at a right angle using a swivel end configuration. It accepts 3/4-inch outside diameter tubing on the flare end and threads to a 1-1/16-14 UNF swivel nut on the mating end. The 45-degree flare angle seals against the tube seat per SAE J512 and SAE J513 standards. Rated to 550 psi maximum working pressure and 250 degrees F, this fitting is suited for refrigerant, hydraulic, and fuel line applications where a rigid elbow would create assembly or routing constraints. Licensed HVAC technicians and plumbers are the typical installers.

This fitting is used in residential and commercial applications involving flared copper or aluminum tubing. Common install scenarios include refrigeration line sets, air conditioning systems, and hydraulic circuits where a 90-degree directional change is needed without using a brazed or compression connection. The swivel nut design allows the nut to rotate freely during assembly, reducing the chance of twisting or kinking the tubing during tightening. It carries a UL Listing and meets SAE J512 and SAE J513, making it appropriate for regulated mechanical and refrigeration systems.

Key Features

• 90-degree swivel nut elbow with 45-degree flare seating angle per SAE J512 and SAE J513
• Brass construction for corrosion resistance and compatibility with refrigerant and hydraulic media
• Swivel end allows free rotation during assembly, preventing tube twist and kink
• Rated to 550 psi maximum working pressure
• Rated to 250 degrees F maximum working temperature
• UL Listed; meets SAE J512, SAE J513, and UNF thread standards

Compatibility

Designed as an OEM-style flare fitting for use with 3/4-inch OD flared tubing systems using a 1-1/16-14 UNF swivel nut thread, consistent with SAE J512 and SAE J513 flare fitting standards.

Installation Notes

Installation is typically performed by a licensed HVAC technician or plumber. Depressurize and isolate the line before disassembly or fitting installation. Ensure the tube end is properly flared to the correct 45-degree angle before seating the fitting — an improper flare is the leading cause of leaks at this joint type. Do not over-torque the swivel nut; hand-tighten first, then use a flare nut wrench to achieve a snug, leak-free seat without deforming the flare.