Midland Industries 08683 Master Cylinder Adapter Brass

Product Description

The MIDLAND INDUSTRIES 08683 is a dual master cylinder adapter designed to connect hydraulic brake lines with mismatched inverted flare fittings. It features a 7/16-inch male inverted flare on one end and a 1/4-inch female inverted flare on the other, allowing a secure transition between the two connection sizes. Threaded 7/16-20 on the male side and 7/16-24 on the female side, this brass adapter handles pressures up to 1400 psi and operates across a temperature range of -65 to 250 degrees F. It is a compact fitting installed by hydraulic system technicians and experienced mechanics working on brake line assemblies.

This adapter is suited for automotive and light-duty hydraulic brake applications where a master cylinder port requires a line-size conversion. It is compatible with aluminum, brass, copper, and steel hydraulic tubing that can be flared to an inverted flare profile. Typical installations involve connecting brake lines at the master cylinder outlet during repair or replacement of hydraulic brake system components in passenger vehicles or light trucks.

Key Features

• Dual inverted flare design: 7/16-inch male inverted flare x 1/4-inch female inverted flare
• Thread specifications: 7/16-20 male x 7/16-24 female
• Rated to 1400 psi working pressure
• Operating temperature range: -65 to 250 degrees F
• Brass construction for corrosion resistance in hydraulic brake environments
• Compatible with aluminum, brass, copper, and steel hydraulic tubing

Compatibility

Designed for use with aluminum, brass, copper, and steel hydraulic tubing that can be flared to an inverted flare profile. Minimum tube wall thickness of 0.03 inches applies.

Installation Notes

Installation should be performed by a qualified mechanic or hydraulic systems technician familiar with brake line service procedures. Depressurize and bleed the hydraulic brake system completely before disconnecting any fittings. Use the appropriate flare wrench to avoid rounding the fitting hex; do not use adjustable pliers on brass fittings. After installation, inspect for leaks and bleed the brake system according to the vehicle manufacturer's procedure before returning the system to service.