Midland Industries 704048-0608 Flare Half Union Adapter

Product Description

The MIDLAND INDUSTRIES 704048-0608 is a SAE 45-degree flare half union adapter designed to connect a 3/8-inch male flared end to a 1/2-inch male NPTF threaded connection. Machined from lead-free brass, it meets potable-water and refrigerant-line standards where lead-free materials are required. Thread sizes are 5/8-18 on the flare side and 1/2-14 on the NPTF side. Rated for service from -40 to 250 degrees F, this adapter handles a range of fluid and gas applications. Plumbers, HVAC technicians, and refrigeration mechanics commonly install this fitting during line connections where a transition from flared tubing to a male pipe thread is required.

This adapter is suited for residential and light commercial plumbing, HVAC refrigerant lines, and gas distribution systems where SAE 45-degree flare connections terminate at a male NPTF port. It is compatible with copper, brass, aluminum, and steel tubing, making it a versatile transition piece across multiple trade disciplines. The half-union design allows the fitting to be disconnected from the tubing side without disturbing the threaded pipe connection, which simplifies future service access.

Key Features

• Lead-free brass construction meets lead-free requirements for potable water and regulated installations
• SAE 45-degree flare seat on the 3/8-inch side provides a leak-resistant metal-to-metal seal
• 1/2-inch male NPTF thread on the pipe side for a pressure-tight dry-seal connection
• Rated -40 to 250 degrees F for use in both hot-water and refrigerant service
• Compatible with copper, brass, aluminum, and steel tubing
• Half-union design allows tubing-side disconnect without disturbing the pipe connection

Compatibility

Compatible with copper, brass, aluminum, and steel tubing systems. Designed for use wherever a 3/8-inch SAE 45-degree male flare to 1/2-inch male NPTF transition is required in plumbing, HVAC, or refrigeration applications.

Installation Notes

Installation should be performed by a licensed plumber or HVAC-refrigeration technician. Shut off and depressurize the line before making or breaking any flare or threaded connection. Use an appropriate flare nut and tubing of the correct outside diameter to ensure a proper 45-degree flare seat engagement. Apply thread sealant rated for the media on the NPTF side; do not apply sealant to the flare seat itself.