Anderson Metals MP11128 Brass Compression Connector 5/16

Product Description

The ANDERSON METALS MP11128 is a brass compression tube connector designed to join tubing to a male NPT threaded port in plumbing, HVAC, and refrigeration piping systems. The fitting transitions from a compression-style tube connection to a 1/8-27 MNPT threaded end, providing a secure, leak-resistant joint without soldering or flaring. The tube outside diameter (OD) is 5/16 inches. Brass construction offers good corrosion resistance and durability in both wet and dry service environments. This connector is a standard component used by licensed plumbers, HVAC technicians, and refrigeration mechanics when routing small-diameter tubing to threaded fittings or valve bodies.

This fitting is suited for residential and light commercial applications involving small-bore tubing runs. Typical installations include connecting copper or compatible tubing to control valves, pressure taps, gauge ports, and instrument connections where a 1/8-27 NPT thread is present. The compression-style end allows field installation without special tooling beyond a standard wrench. This connector is sold in packs of 5, making it practical for service trucks and job sites where multiple connections may be needed.

Key Features

• Brass construction for corrosion resistance in plumbing and HVAC service environments
• Compression x MNPT end connections eliminate the need for soldering or flaring
• 1/8-27 male NPT thread for compatibility with standard threaded ports and valve bodies
• 5/16 inch tube OD compression end for small-bore tubing connections
• Pack of 5 per package for efficient stocking on service vehicles or job sites

Compatibility

Designed as an OEM-style replacement or standard service fitting for plumbing, HVAC, and refrigeration systems requiring a 5/16 inch OD compression to 1/8-27 MNPT connection.

Installation Notes

Installation is typically performed by a licensed plumber or HVAC technician. Shut off the supply line and relieve system pressure before removing any existing fitting or connecting this connector. Use two wrenches to avoid twisting tubing during tightening. Apply thread sealant or PTFE tape to the MNPT threads in accordance with applicable IPC or IFGC requirements; do not overtighten the compression nut, as brass fittings can crack under excessive torque.