Midland Industries 39773 7-way Double Grip Plug

Product Description

The MIDLAND INDUSTRIES 39773 is a 7-way double grip plug designed for air brake system connections on commercial vehicles. The plug features a nickel-plated zinc body that resists corrosion in demanding road and shop environments. At 0.495 pounds, it is a compact, durable component used to connect glad-hand-style multi-circuit air lines between a tractor and trailer. The double grip design provides a secure mechanical connection that resists accidental disconnection during operation. This plug is installed without a spring guard, making it suitable for applications where that additional retention component is not required.

This plug is used in air brake accessory applications on Class 6, 7, and 8 commercial trucks, tractors, and trailers where a 7-way multi-circuit air connection is needed. It is a common service and replacement part for fleet maintenance shops and independent diesel technicians working on tractor-trailer brake systems. The nickel-plated finish helps maintain conductivity and appearance across frequent connect-disconnect cycles in outdoor and dockside environments.

Key Features

• 7-way double grip configuration for secure multi-circuit air brake connections
• Nickel-plated zinc body for corrosion resistance and durability
• No spring guard design for applications where simplified connection is preferred
• Compact form factor: 4.2 inches tall, 2.55 inches wide, 1.65 inches in length
• Lightweight at 0.495 pounds for easy handling during service

Compatibility

Designed as an OEM-style replacement air brake plug for commercial tractor-trailer applications requiring a 7-way double grip plug without a spring guard.

Installation Notes

Installation and service of air brake system components should be performed by a qualified commercial vehicle technician familiar with FMCSA air brake regulations. Depressurize the air system completely before disconnecting or replacing any air brake plug or socket. Inspect mating sockets and glad-hand seats for wear or damage before installing the replacement plug. Verify all connections are fully seated and leak-free before returning the vehicle to service.