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This heavy-duty trailer connector socket has an outlet for 7-way, 5-way and 4-way flat plugs. A weatherproof, insulated lids cover the terminals. The cover is also easy to open and extra-durable.

Five-wire design is perfect for newer boat trailers that have hydraulic brakes. Easy-pull connector housing makes disconnecting a snap and includes built-in mounting holes and a protective dust cover.

The 5 way flat trailer connector is most commonly found on boat trailers that have hydraulic brakes. The fifth wire is hooked up to the reverse light circuit on the vehicle which then sends a signal to the hydraulic coupler to disengage the trailer brakes.