Midland Industries 38720B Gladhand Seal Rubber Blue

Product Description

The MIDLAND INDUSTRIES 38720B is a rubber gladhand seal designed for use in air brake coupling systems on commercial vehicles and trailers. This blue-colored seal fits inside the gladhand coupler to create an airtight connection between tractor and trailer air lines, preventing pressure loss across the service or emergency brake circuits. Measuring 1.55 inches in length and 1.55 inches in width with a height of 0.3 inches, it is a compact, direct-replacement component. Fleet mechanics, truck technicians, and trailer service shops install this seal as part of routine brake system maintenance or when replacing worn or cracked coupling seals.

This seal is suited for over-the-road trucking, fleet maintenance, and trailer repair applications where DOT-compliant air brake connections are required. The blue color coding is a standard industry convention used to identify the service (primary) air line gladhand, helping technicians make quick and accurate connections during hookup. It is appropriate for use in both line-haul and vocational trailer applications where standard gladhand couplers are installed.

Key Features

• Blue color coding for service air line identification per standard industry convention
• Rubber construction provides flexibility and resistance to compression set under repeated coupling cycles
• Compact profile: 1.55 inches by 1.55 inches footprint, 0.3 inches height
• Direct-replacement fit for standard gladhand coupler housings
• Lightweight at 0.015 pounds, minimizing added load in brake system assemblies

Compatibility

Designed as a replacement seal for standard gladhand air brake couplers used in commercial truck and trailer air brake systems. No specific model or system compatibility data was provided in the product input.

Installation Notes

Installation is performed by qualified truck or trailer brake technicians familiar with DOT air brake system requirements. Before replacing the seal, depressurize the air brake system completely and disconnect the gladhand coupler from the mating connection. Seat the seal evenly into the gladhand coupler groove, ensuring no twisting or gaps around the perimeter. After reconnecting, pressurize the system and inspect the coupler joint for leaks before returning the vehicle to service.