Midland Industries 12016 Brass Hex Nut 3/8 in Male Inverted Flare

Product Description

The MIDLAND INDUSTRIES 12016 is a brass hex nut designed for 3/8-inch male inverted flare connections in hydraulic and fluid-transfer line assemblies. Machined from brass, this nut threads onto inverted flare fittings and tubing ends to create a secure, leak-resistant joint rated to 1000 psi. The 5/8-18 thread size is standard for inverted flare applications, and the hex profile accepts a standard open-end or combination wrench for fast, reliable makeup. Licensed plumbers, hydraulic technicians, and fluid-system mechanics install this type of fitting in both stationary and mobile equipment applications.

The 12016 is suited for use with copper, brass, aluminum, and steel hydraulic tubing with a 0.032-inch wall thickness. It is rated for temperatures ranging from -65 degrees F to 250 degrees F, making it appropriate for both refrigeration-adjacent and moderate-heat hydraulic circuits. This nut is a straightforward replacement or repair component for inverted flare line assemblies in residential, commercial, and light industrial fluid systems.

Key Features

• Brass construction for corrosion resistance and reliable sealing on inverted flare joints
• Rated to 1000 psi working pressure
• Temperature range: -65 degrees F to 250 degrees F
• 5/8-18 thread size - standard for 3/8-inch inverted flare tubing
• Compatible with copper, brass, aluminum, and steel hydraulic tubing at 0.032-inch wall thickness
• Hex profile for wrench engagement - no special tooling required

Compatibility

Designed for use with copper, brass, aluminum, and steel hydraulic tubing with a 0.032-inch wall thickness on 3/8-inch male inverted flare connections.

Installation Notes

Depressurize and drain the hydraulic or fluid line fully before removing or installing any fitting. Thread the nut onto the inverted flare seat by hand first to confirm thread engagement before applying wrench torque. Use a calibrated open-end or combination wrench sized for the 5/8-inch hex. Follow applicable plumbing or hydraulic system codes for pressure testing after reassembly.