What is the Mounting Bolt Pattern of the etrailer Electric Trailer Jack?

Updated 10/07/2025 | Published 09/28/2025

Question:

What is the mounting flange bolt hole center? I currently have a square tube jack and eould like to replace it with one of these. I prefer not to have to drill more holes in the mounting plate

asked by: Jimmy

Expert Reply:

Hey Jimmy, welcome back! The etrailer Electric Trailer Jack item # e55ZV has the standard A-frame jack mounting bolt pattern of 3" on center. The mounting bracket has slotted holes so there's some wiggle room too. The outer tube diameter is 2-1/4".

The etrailer item # e55ZV has a 5,000 lbs capacity and provides an 18" lift. The jack includes LED lights, a cover to keep it protected, and also comes with a limited lifetime warranty. In the event your trailer battery is dead there is an emergency manual crank included.

What happened to your old jack?

expert reply by: Jerred H

etrailer Electric Trailer Jack
(click to enlarge)

Jimmy

10/7/2025

I had a square jack and this one will fit in the hole but the bolt flanges will not work without modifying and making a flange adapter on my trailer. I am currently debating if I want to make an adapter plate or send this back