Parker 14FSX-8 Brass Short Flare Nut 1/2 in Od 3/4-16 Unf

Product Description

The PARKER 14FSX-8 is a forged brass short nut designed for 45-degree flared tube connections in fluid and refrigerant line assemblies. It accepts a 1/2-inch tube OD and threads onto mating fittings with a 3/4-16 UNF thread. Rated to 750 psi maximum working pressure and 250 degrees F, this nut is built for demanding service in hydraulic, refrigeration, and pneumatic systems. The short-body design suits tight-clearance installations where a standard-length nut would not seat properly. Licensed HVAC technicians, plumbers, and fluid-system technicians are the primary installers of this type of fitting.

The 14FSX-8 is suited for residential and light commercial applications where SAE 45-degree flare connections are standard. Typical use cases include refrigerant line sets, fuel lines, hydraulic tubing, and compressed-air systems that require a secure, leak-resistant mechanical joint. The forged brass construction resists corrosion in wet or chemically active environments, making it appropriate for both indoor and outdoor installations where copper or steel tubing is terminated with a 45-degree flare.

Key Features

• Forged brass construction for strength and corrosion resistance
• 45-degree flare end connection per SAE J512 and SAE J513
• 3/4-16 UNF thread for positive, vibration-resistant engagement
• 750 psi maximum working pressure rating
• Rated to 250 degrees F maximum working temperature
• UL Listed; meets SAE J512, SAE J513 standards

Compatibility

Designed as an OEM-style replacement or service fitting for systems using SAE 45-degree flared tube connections with a 1/2-inch tube OD and 3/4-16 UNF mating thread.

Installation Notes

Installation is performed by licensed HVAC technicians, plumbers, or qualified fluid-system mechanics. Shut off and depressurize the system fully before disassembling any flare connection. Use a calibrated flaring tool to ensure the tube end meets SAE 45-degree flare geometry before seating the nut; a misformed flare is a primary cause of joint leakage. Do not overtighten — use a torque wrench and follow the applicable SAE or system-specific service procedure for the tubing material and diameter in use.