Pin Diameter of 3-5/8 Inch Long Trailer Coupler Locks

Updated 05/12/2021 | Published 05/09/2021

Question:

I need this lock. I need the 3-5/8 length. But I measured the pin that goes into my trailer and its 8mm thick. 1/4 inch might have too much play. Do you have a lock that is that long 3-5/8 but a bit thicker? I want it to fit tight in there coupling.. Thank you

asked by: Rene J

Expert Reply:

The 3-5/8 inch long trailer coupler locks do only have pin diameters of 1/4 inch; there isn't a coupler lock available with a pin that has a slightly larger diameter, as the 1/4 inch is indeed standard. The locks that are 3-5/8 inches long are as follows:

- Bulldog Easy Access Coupler Lock # BD580409

- MaxxTow Coupler Latch Lock # MT76FR

I have added some links below to video reviews for you to check out as well if you'd like to take a look.

expert reply by: Kyle S