How To Determine What The Bolt Pattern Of Your Trailer's Pin Box

Updated 05/11/2023 | Published 05/09/2023

Question:

What pin box do I have ? I’m looking to replace it Thank you

asked by: Enrique G

Expert Reply:

The only way to determine what your pin box's bolt pattern is would be to either get the serial number/RPO number off the tag on the pin box or to use the attached guide below to measure the bolts and crossover those measurements on the included charts to determine the pattern. Once we have the bolt pattern we can then find the correct replacement depending on what you're needs are.

If you experiencing side-to-side, front-to-back, or up-and-down motion from your trailer then we have different solutions to help address the issue. I'll also need to know the GVWR of your trailer to ensure the replacement is rated high enough for the trailer's weight.

For example, the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # GY68GR you were looking at has a 1621 bolt pattern and has a 30K GTW capacity. The torsion design of this pin box works best with pin weights from 2,000lbs to 4,500lbs to help absorb road shock.

expert reply by: Kevin C