Midland Industries 18216 Brass Compression Male Adapter

Product Description

The MIDLAND INDUSTRIES 18216 is a brass compression male adapter designed to connect copper, aluminum, or thermoplastic tubing to a male NPTF threaded port. The fitting transitions a 5/8 inch tube OD compression connection to a 1/4 inch male NPTF thread. Rated to 150 psi and suited for temperatures ranging from -65 degrees F to 250 degrees F, this adapter handles the pressure and temperature demands common in refrigeration, HVAC, and plumbing applications. The 13/16-18 x 1/4-18 thread spec and 0.87 inch hex allow installation with standard hand tools.

This adapter is used in residential and light commercial systems where tubing must terminate at a threaded port - common in refrigerant line sets, fuel gas accessories, and hydraulic or pneumatic low-pressure circuits. The compression end accepts copper, aluminum, and thermoplastic tubing, making it a versatile fitting for plumbers, HVAC technicians, and pipefitters working with soft-tubing assemblies. The 1.21 inch center-to-end measurement assists in tight-space layout planning.

Key Features

• 5/8 inch tube OD compression inlet to 1/4 inch male NPTF outlet
• Brass construction for corrosion resistance and reliable sealing
• Rated to 150 psi working pressure
• Temperature range: -65 degrees F to 250 degrees F
• Compatible with copper, aluminum, and thermoplastic tubing
• 0.87 inch hex for wrench engagement with standard tools

Compatibility

Designed for use with copper, aluminum, and thermoplastic tubing in compression fitting assemblies requiring a 1/4 inch male NPTF threaded connection.

Installation Notes

Installation is performed by licensed plumbers or HVAC technicians following applicable IPC or IFGC guidelines depending on the service. Shut off and depressurize the system completely before disassembling or installing any compression fitting. Do not overtighten the compression nut, as brass fittings can crack under excessive torque. Inspect tubing ends for burrs or deformation before seating in the compression sleeve.