Midland Industries 39878 Emergency Gladhand 1/2 in Fpt

Product Description

The MIDLAND INDUSTRIES 39878 is an aluminum emergency gladhand with an integrated filter, designed for use in commercial vehicle air brake systems. Gladhands serve as the quick-connect coupling point between a tractor and trailer, and the emergency circuit carries the supply air that holds trailer brakes in the released position. The 39878 features a 1/2-inch Female Pipe Thread (FPT) connection and includes a black rubber seal, which provides an airtight mate at the coupling face. At 0.405 pounds, it is a lightweight, durable replacement or service part suited for fleet maintenance and heavy-duty truck repair applications.

This gladhand is intended for the emergency (supply) line in tractor-trailer air brake systems. It is commonly installed during preventive maintenance intervals, roadside service calls, or fleet refurbishment work where worn or damaged emergency couplers must be replaced. The integrated filter helps protect downstream brake system components from contamination. Technicians working on Class 6 through Class 8 vehicles will encounter this fitting in standard dual air line configurations.

Key Features

• Emergency (supply) line gladhand for tractor-trailer air brake systems
• Aluminum body construction for corrosion resistance and reduced weight
• Integrated filter to help protect air brake components from debris
• 1/2-inch FPT connection for standard pipe thread installations
• Black rubber seal included for a reliable, airtight coupling interface
• Lightweight at 0.405 pounds for easy handling during service

Compatibility

Designed as an OEM-style replacement emergency gladhand for commercial tractor-trailer air brake systems using a 1/2-inch FPT supply line connection.

Installation Notes

Installation should be performed by a qualified commercial vehicle technician familiar with FMCSA air brake system regulations. Before servicing, drain and depressurize the vehicle air system completely and chock all wheels. Apply thread sealant appropriate for air service to the FPT threads before installation. Verify the rubber seal is properly seated and the coupling locks securely before returning the vehicle to service.