Midland Industries 20228 Hex Nut Sleeve Assembly Flareless Brass

Product Description

The MIDLAND INDUSTRIES 20228 is a universal hex nut and sleeve assembly designed for flareless tube connections in fluid and pneumatic systems. This two-piece brass fitting consists of a hex nut and compression sleeve that grip the tube mechanically without requiring a flare. It carries a working pressure rating of 300 psi and is rated for service from -65 degrees F to 250 degrees F. At 0.41 inches in length with a 0.44-inch hex profile and a 3/8-24 thread size, it is a compact, lightweight component suited for tight installation spaces. Plumbers, HVAC technicians, and industrial piping professionals install this fitting where a reliable, leak-resistant flareless connection is required.

This assembly is designed for use with aluminum tubing, copper tubing, and hard plastic tubing when paired with the included brass sleeve. It is a common choice in refrigeration lines, hydraulic control circuits, instrumentation tubing, and low-pressure pneumatic systems where a standard flare tool is not available or practical. The 3/16-inch connection size makes it appropriate for small-diameter tubing runs found in both residential and light commercial applications.

Key Features

• Flareless design eliminates the need for a flare tool during assembly
• Brass construction provides corrosion resistance in fluid and gas service
• Rated to 300 psi working pressure
• Wide temperature range: -65 degrees F to 250 degrees F
• Compatible with aluminum, copper, and hard plastic tubing
• Compact hex profile at 0.44 inches for use in confined spaces

Compatibility

Designed for use with aluminum tubing, copper tubing, and hard plastic tubing when a brass sleeve is installed. Fits 3/16-inch flareless tube connections with a 3/8-24 thread size.

Installation Notes

This fitting is installed by hand-tightening the hex nut and then advancing it with a wrench to seat the sleeve against the tube wall. Shut off and depressurize the line completely before disassembly or installation. Use an appropriately sized open-end or combination wrench sized to the 0.44-inch hex. Verify tube squareness and cleanliness before assembly to ensure a proper seal.