Coupler Lock for Bulldog Collar Lok Coupler to Lock the Coupler to a Trailer

Updated 06/16/2014 | Published 06/15/2014

Products Featured in This Question

etrailer Surge Brake Coupler Lock - 3-3/8" Span - 1/4" Diameter - Chrome

(538)

$29.01

Question:

I just picked up a used trailer with a bull dog collar lok coupler. Is there any way to lock the coupler when hooked up onto the ball? I sometimes leave the trailer hooked up to the tow vehicle overnight or for a few days and was looking for some way to prevent someone from unlatching my trailer from tow vehicle, hooking it up to their truck and driving away. Thanks...

asked by: Bob

Expert Reply:

For your Bulldog coupler you would have to use the Trailer Coupler Lock, part # 28012. This is a coupler lock with an inside width of 3-3/8 inches. I pulled the Bulldog coupler from our warehouse and measured the size of the lock pin that goes in the coupler. It measured 5/16 inch diameter and a length of 2-3/4 inches. I tried the lock in the coupler and it fit and did keep the collar lock from opening. See the picture to the right that will show it installed on a similar coupler.

expert reply by: Jameson C