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  1. Adjustable Trailer Coupler
  2. Bulldog
  3. 2 Inch Ball Coupler
  4. Coupler Only
  5. 7000 lbs GTW
  6. Pin-Style Fastener
Bulldog Collar-Lok Coupler - Grey - Adjustable Channel Mount - 2" Ball - 7,000 lbs

Bulldog Collar-Lok Coupler - Grey - Adjustable Channel Mount - 2" Ball - 7,000 lbs

Item # BD028584
Our Price: $104.40
Adjustable Trailer Coupler
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The collar on this heavy-duty coupler slides over the hinge for unmistakable security. Tight, rigid mount design ensures a strong, rattle-free connection. Mounts in 3" channel bracket (sold separately) with included bolts - no need for a wrench. 1-800-940-8924 to order Bulldog adjustable trailer coupler part number BD028584 or order online at Free expert support on all Bulldog products. Great prices and Fastest Shipping for Bulldog Collar-Lok Coupler - Grey - Adjustable Channel Mount - 2" Ball - 7,000 lbs. Adjustable Trailer Coupler reviews from real customers.
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  • Reviews (604)
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  • Videos (2)
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Bulldog Adjustable Trailer Coupler - BD028584

  • 2 Inch Ball Coupler
  • Coupler Only
  • 7000 lbs GTW
  • Pin-Style Fastener
  • Bulldog

The collar on this heavy-duty coupler slides over the hinge for unmistakable security. Tight, rigid mount design ensures a strong, rattle-free connection. Mounts in 3" channel bracket (sold separately) with included bolts - no need for a wrench.


  • Heavy-duty coupler lets you hook up your trailer to your tow vehicle
    • Provides connection point for hitch ball
    • Ideal for utility, livestock, cargo, and construction trailers
  • Ball-and-socket joint closes tight around ball
    • Allows for multi-directional movement to keep trailer from binding
    • Spring-loaded hinge with stop tab quickly releases without overextending
    • Force transfer feature keeps latch from torquing or breaking
  • Collar-Lok gives visual indication that the coupler is securely closed
    • Pin-style fastener holds collar in place around base of hinged ball socket
      • Pin is chained to coupler so you won't lose it
  • Rigid channel mount with anti-rattle design significantly reduces noise
    • Hexagonal indents in coupler mounting channel hold nuts in place so you can easily tighten bolts for a firm connection
  • Downward bias offers better ball contact and a clean, straight-line look
  • Adjustable channel mount lets you change coupler's height depending on application
    • 4 Grade 5 mounting bolts with locknuts included
    • Channel bracket sold separately
  • Lightweight hollow shank
  • Heavy-duty steel construction
  • Powder coat finish resists corrosion
  • SAE standard compliant


  • Application: 3" wide channel bracket
  • Ball size: 2"
  • Weight capacity: 7,000 lbs
  • Length: 10"
  • 5-Year limited warranty

Rigid Mount Design

This rigid-mount coupler fits tightly within the channel bracket (sold separately) for a secure and rattle-free connection. Four mounting bolts with nuts are included for installation.

Hexagonal Grooves

Hexagonal grooves are cast into the inside of the coupler's channel to hold the nuts in place for you as you tighten the bolts down when mounting the coupler in your trailer's channel bracket. This not only makes installation faster and easier, but it also allows for a tighter fit that eliminates movement and noise. It also reduces any jolting that occurs during acceleration and braking.

Collar-Lok Connection

Collar Lok

The ball-and-socket joint of the coupler keeps the hitch ball captive by providing a continuously tight fit. Within the socket, the ball retains full range of motion so that it can rotate in any direction to keep your trailer from binding up.

To hook up your trailer, simply lower the coupler over the hitch ball and close the hinged latch around the ball. Then slide the Collar-Lok over the latch. When the collar is in place, it not only protects the hinge joint, but it also gives you visual assurance that the latch is securely closed. As a final step, slide in the coupler pin. This pin is chained to the coupler so you won't lose it. Because the pin hole is angled instead of being straight up and down, inserting and securing the pin is easy.

Spring-Loaded Hinge

Simply reverse the steps to unhook your trailer from your tow vehicle. Slide the pin out and push the Collar-Lok back.The spring-loaded hinge will pop open for a quick release. A built-in stop tab will keep the jaw from flinging out too far as the coupler opens. The stop tab is a unique addition that prevents the hinge from overextending.

The latch has a force-transfer feature to add stability as the ball is forced against it on bumpy roads. This keeps the hinge joint and latch from breaking or torquing to extend the life of the coupler.

Downward Bias

The downward bias of the coupler improves the angle at the articulation point and allows for a better connection with the hitch ball. The result is better support for heavy loading and a nice, streamline look.

028584 Bulldog Collar-Lok Coupler - Adjustable Channel Mount - Pin Style - 7,000 lbs - Grey

Replaces BD028390

Video of Bulldog Collar-Lok Coupler - Grey - Adjustable Channel Mount - 2" Ball - 7,000 lbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Bulldog Collar-Lok Coupler Review

Today, we're gonna be taking a look at the Bulldog adjustable trailer coupler. It's gonna be a collar lock style. It's gonna be ideal for your livestock trailers. Also your horse trailers, and even the construction trailers you may be hauling around. What makes this better than some of the other ones is the amount of movement that you get. Whenever I am hauling around the horses, sometimes it's pretty uneven terrain.

This one's a two inch and it gives us plenty of travel, once we engage with the lock right there. This is a lot more than your standard coupler. So it's definitely for those more uneven terrains and it's super, super strong. The two inch version is gonna give us, pull this out real quick. The two inch version is gonna give us a 7,000 pound gross trailer weight rating.

So match that up with your trailer and what you plan on putting on it. And that's for a two inch ball, but we also have a two and five sixteenths inch ball, which goes all the way up to 12,500 pounds. So get an idea of how much stuff you're putting on your trailer and make sure that you pair it up with the right ball size that you have on your vehicle. All you're gonna need to be able to use a adjustable trailer coupler is this channel right here. If you have one already, you just measure in between the two, you wanna make sure that it's gonna have a gap of three inches.

The holes are gonna be five eighths of an inch in diameter. And then also, you just wanna make sure that they're spaced out two inches apart from center to center of each hole, and then it's gonna fit. It comes with all the hardware. And if you come in pretty close, I do like this hardware. Sometimes you have the longer bolts, so you only have two.

This seems like it's gonna be a lot more work, but it's actually not. So notice how the nuts are recessed in there. So you don't have to have a wrench inside there to get it fully tightened down. I really do appreciate that design. It didn't take me a whole lot of time to install it. The hardware provided is grade five, which is gonna be a little bit stronger than just your standard bolts. It's gonna come with a bolt, a lock washer, and then a lock nut on the other end. And all you need to do is grab a 24 millimeter socket to lock it down and a torque wrench to torque it down to spec. Depending on what size you go with, whether it's a two inch or the two and five sixteenths, they're the exact same. So when it comes to measurements, the overall length of it's gonna be 10 inches. And then let's just do a measurement from the center of our mounting holes to the center of the ball. And that, I'd say, is about seven and a quarter inches. I've dealt with a lot of these couplers. One thing I noticed about the Bulldog is it has a little bit stronger springs than some of the other ones. So if you are going to use your hands, watch them, because this sleeve comes back pretty quickly. I recommend just having a mallet. So whenever you load up, let's say like this, put it in there, this is just gonna keep your hands safe, but you can also just use your foot. And then whenever we're done, you have a little pin here, which the length's gonna be about two and a quarter inches long. So if you wanted to get a locking pin for it, just make sure it's gonna be able to fit with that span. And then you put that in there and it's not gonna come undone. I do like how they connected it with the little chain 'cause I always lose these, so I really do appreciate that. But this thing is a really good amount because you can just see that it's locked in. It gives you a visual little representation that it's actually closed in and it's so tough to get back. So, I don't think this thing's coming undone. It's gonna give me peace of mind whenever I hook up. If you're gonna go with the Bulldog adjustable trailer coupler, there is something I recommend and that is a lock. We can do two different things. You can either get a lock that we designed that'll go through at this point right here if you want, or there's another lock that is designed specifically for this, and it's gonna go and cover this whole entire section. So definitely lock it up, especially if you're on the job site, you want your trailer to be there in the morning. So, definitely add that to your cart. At the end of the day, I think these have a little bit stronger springs than some of the other ones that we worked with, whether that's something you're looking for or not. I think most of these are pretty much the same exact thing. You just wanna make sure it's not going to be rated for less than what's gonna be on your trailer. So take that into account whenever you're picking which one but I do think the Bulldog adjustable trailer coupler is gonna be a great option for you..

Customer Reviews

Bulldog Collar-Lok Coupler - Grey - Adjustable Channel Mount - 2" Ball - 7,000 lbs - BD028584

Average Customer Rating:  4.8 out of 5 stars   (604 Customer Reviews)

The collar on this heavy-duty coupler slides over the hinge for unmistakable security. Tight, rigid mount design ensures a strong, rattle-free connection. Mounts in 3" channel bracket (sold separately) with included bolts - no need for a wrench.


The best coupler we have used for our construction business. I have been using these for 14 years now without any problems. We replace them every 5 years at about 160,000 miles when we purchase new trailers. I currently need three now but they have been out of stock for several months. Still waiting for new stock to arrive so I can order. I feel safe with this type coupler and my employees also like the security it provides.


Really fast shipping, install only took 15 min, and much more solid than the original coupler on the trailer that used two long bolts (which wore and caused the holes to get oblong making the connection to the trailer sloppy), as compared to the four bolts provided with the new coupler.


We are a large whitewater rafting company and use Bulldog couplers on all our trailers, hauling boats to and back from the river. We've never had issues with any of them and I'd absolutely recommend this particular product. They are easy to install, easy to operate, and last forever, even in the grueling Arizona climate.


Like that it is a heavy duty hitch, like the way it locks and attaches to the ball. Don't like that is doesn't have a handle/lever on the collar to push it on or pull it off.


Ordered multiple parts everything fit together perfectly.
Overall from ordering to shipping was a great experience.
Thanks etrailer


Product was easy to order and is of excellent quality. It arrived right away and was very hassle free.
I would order from etrailer again..


Great hitch great customer service


Awesome service! Right parts! Good job etrailer.


Great hitch and a decent price with EXCELLENT CUSTOMER SERVICE.


Excellent quality.made of good metal.I find it to be as good as any of the others I’ve got.Shipping was fast and on provided emails that kept me informed and up to date I would recommend this product to anyone


good product ,good price, very fast shipping, was suprised


Installed on a 2000lb wood chipper. Extremely heavy duty. Four bolts completely eliminate the noise. Would definitely buy again.


Good quality hitch.


Works Great


Five star service from etrailer, and maybe a two or three-star product from Bulldog. Aside from the rust and the fact that the collar is so stiff that it can't be operated by hand, the fabrication on the steel attachment plate is poor. The holes for the tongue jack are punched out, twice in some cases, resulting in an enlarged hole, but there are no threads for the tongue jack so you'll have to fumble around and use nuts underneath. The vertical angles on the steel are wrong, so it will splay out at the bottom and won't fit tightly to the A-frame and you will need to shim it out. The interior of the casting is full of weld spatter that will chafe the tow ball. I bought the less-expensive Ram sleeve-lock coupler under a Curt label and the fabrication is much better, having none of the problems the BullDog did. etrailer kindly sent me an RMA to return the BullDog.


My opinion a Bull Dog hitch is the only good trailer hitch on the market


This is how I received my merchandise I was lucky the part was still
In side the box


The Bulldog coupler is SO MUCH easier to hitch up and disengage than my previous coupler which required several back and forth movements of my tow vehicle to engage/disengage the hitch ball.


Don’t buy this!!! It literally does not work. You can’t open the coupling because it was built incorrectly. There isn’t enough room to slide the coupling back. Of course I didn’t realize this until I had mounted it on my trailer. etrailer customer service is about to get an earful!


exactly what I needed for my trailer,


Receiver worked perfect with 3” square tube


Works great. Welded it on and was ready to go. Have ordered from etrailer before, and just like every time before my parts arrived very promptly and have never had any complaints with service. Will definitely be using etrailer again.


Heavy duty, clean - no bulk to deal with and can step on the tongue easily to climb up, etc. Perfect for up to 7K# trailer. When it is latched, it is latched and in the truck and away you go! Great Bulldog product.


Great site. This is the second time that I have purchased items from etrailer. Your web page is easy to use and I like the product videos. The trailer couplerI bought was very good and fit properly.


I have a 2003 Jeep Liberty CRD. The spare tyre of the Liberty means the standard tow hitch is on a long bar to clear the spare tyre. I wanted a low profile coupling so I could bring the hitch point in closer to the rear axle to improve the towing characteristics with a 5000 lb trailer. One photo shows my old set-up and the other with the Bulldog. This coupling was ideal.

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See what our Experts say about this Bulldog Adjustable Trailer Coupler

Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Cole B
Installed by:
Cole B
Employee Adam E
Installed by:
Adam E
Employee Chris R
Video Edited:
Chris R
Employee Shelly K
Written by:
Shelly K
Employee Charles A
Video by:
Charles A

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