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What is the Size of the Plug On the Back of the Adapter 4-Pole to 7-Pole and 4-Pole  

Question:

I would like to flush mount this to the bumper of my 2019 Chevy Express 3500 similar to the factory mount you might find on a truck. This is to provide enough clearance while turning so i can use the CURT 51180 Echo Mobile Electric Trailer Brake Controller. What is the diameter of this plug? I have already mounted to underneath of the bumper but with the Echo installed I am concerned there is not enough clearance. I have the Heavy Duty Curt Hitch installed.

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Expert Reply:

The outer diameter of the plug on the back of the Adapter 4-Pole to 7-Pole and 4-Pole part # 37185 is 2" which we confirmed by measuring for you.

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Conner L

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