Parker 43F-6-4 Brass Flare to Solder Fitting 3/8 in Od

Product Description

The PARKER 43F-6-4 is a brass flare-to-solder tube fitting designed to connect a flared tubing end to a solder-cup joint in refrigeration, HVAC, and plumbing systems. It features a 45-degree flare angle and a 5/8-18 UNF thread, accepting 3/8 inch OD tubing on the flare end. The reduced outside diameter on the solder end measures 1/4 inch, making this an adapter-style fitting suited for transitioning between tube sizes or connection types. Constructed entirely from brass, it provides reliable corrosion resistance in both wet and refrigerant-handling environments. HVAC technicians and plumbers install this fitting when joining flared copper lines to soldered copper assemblies.

This fitting is commonly used in residential and light commercial HVAC systems, refrigeration lines, and copper plumbing installations where a transition from a flared connection to a soldered joint is required. It is well-suited for service and retrofit work where one side of a line set or refrigerant circuit terminates in a flare and the downstream piping requires a brazed or soldered connection. The compact brass construction makes it appropriate for tight spaces in equipment cabinets and mechanical chases.

Key Features

• 45-degree flare angle matches standard SAE flare fittings used in HVAC and refrigeration
• 3/8 inch OD flare end accommodates common copper refrigerant and plumbing tubing sizes
• 5/8-18 UNF thread provides a secure, leak-resistant mechanical connection on the flare side
• 1/4 inch reduced OD solder end allows direct soldering or brazing to downstream copper tubing
• Full brass construction resists corrosion in refrigerant and water service environments

Compatibility

Designed as an OEM-style replacement or service fitting for HVAC, refrigeration, and copper plumbing systems requiring a 45-degree flare-to-solder adapter with 3/8 inch OD flare and 5/8-18 UNF thread.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber. Recover any refrigerant and isolate the system before disassembling flare connections. Torque the flare nut onto the 5/8-18 UNF thread using an appropriately sized flare-nut wrench rather than adjustable pliers to avoid distorting the fitting. Solder or braze the solder-cup end using techniques consistent with local mechanical codes and manufacturer guidelines for the tubing material in use.