Midland Industries 704048-0402 Flare Half Union Adapter

Product Description

The MIDLAND INDUSTRIES 704048-0402 is a SAE 45-degree flare half union adapter machined from lead-free brass. It connects a 1/4-inch male flared end to a 1/8-inch male NPTF port, using a 7/16-20 thread on the flare side and a 1/8-27 thread on the NPTF side. This type of adapter is used to transition between flare tubing connections and threaded pipe fittings in refrigeration, HVAC, and plumbing systems. It is installed by licensed HVAC technicians and plumbers working with small-diameter tubing runs. The lead-free brass construction meets material standards for potable and non-potable fluid service.

This adapter is suited for residential and light commercial applications where copper, brass, aluminum, or steel tubing must terminate into a threaded male NPTF port. Typical install scenarios include refrigerant line connections, fuel gas sub-assemblies, and hydraulic or pneumatic tubing runs. The SAE 45-degree flare seat ensures a leak-free mechanical seal without the need for thread sealant on the flare side. Operating temperature range is -40 to 250 degrees F, making it appropriate for both hot and cold service lines.

Key Features

• SAE 45-degree flare seat provides a reliable metal-to-metal seal on the flare connection
• Lead-free brass construction suitable for both potable and non-potable fluid systems
• 1/4-inch male flared (7/16-20) x 1/8-inch male NPTF (1/8-27) thread configuration
• Rated for service from -40 to 250 degrees F
• Compatible with copper, brass, aluminum, and steel tubing

Compatibility

Designed for use with copper, brass, aluminum, and steel tubing in systems requiring a SAE 45-degree flare-to-male NPTF transition fitting.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber. Shut off all pressure to the line and depressurize the system before fitting installation. Use an appropriately sized flare tool to form a proper SAE 45-degree flare on the tubing end before seating the connection. Apply thread sealant to the NPTF threads as required by applicable code; no sealant is needed on the flare seat itself.