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  1. A-Frame Trailer Coupler
  2. Bulldog
  3. 2-5/16 Inch Ball Coupler
  4. Weld-On
  5. 15000 lbs GTW
  6. Standard Coupler
Bulldog Heavy-Duty Cast Head Coupler w/ Wedge Latch - 2-5/16" Ball - A-Frame - 15,000 lbs

Bulldog Heavy-Duty Cast Head Coupler w/ Wedge Latch - 2-5/16" Ball - A-Frame - 15,000 lbs

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A-Frame Trailer Coupler
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Shipping Weight: 18 lbs
Bulldog Standard Coupler - BD44150W0317
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Durable cast coupler features the easy-to-use Wedge Latch for simple, quick hookup and has a built-in attachment point for round, A-frame utility jacks. 1-833-496-1390 to order Bulldog a-frame trailer coupler part number BD44150W0317 or order online at Free expert support on all Bulldog products. Guaranteed Lowest Price and Fastest Shipping for Bulldog Heavy-Duty Cast Head Coupler w/ Wedge Latch - 2-5/16" Ball - A-Frame - 15,000 lbs. A-Frame Trailer Coupler reviews from real customers.
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  • Reviews (16)
  • Q & A (0)
  • Videos (1)
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Bulldog A-Frame Trailer Coupler

  • 2-5/16 Inch Ball Coupler
  • Weld-On
  • 15000 lbs GTW
  • Standard Coupler
  • Trigger Latch
  • Bulldog

Durable cast coupler features the easy-to-use Wedge Latch for simple, quick hookup and has a built-in attachment point for round, A-frame utility jacks.


  • Heavy-duty coupler is ideal for utility, livestock, cargo and construction trailers
  • Wedge-style latch is secure and easy to use
  • Built-in jack-attachment point allows for quick, easy mounting of round utility jack
  • A-frame design mounts to 50-degree trailer tongue


  • Application: 50-degree A-frame
  • Ball size: 2-5/16"
  • Length: 18"
  • Hole diameter for jack: 2-1/4"
  • Capacity: 15,000 lbs
  • Limited 5-year warranty

44150W0317 Bulldog Wedge-Latch Cast Head A-Frame Coupler - 15,000 lbs

Item # BD44150W0317

California residents: click here

Video of Bulldog Heavy-Duty Cast Head Coupler w/ Wedge Latch - 2-5/16" Ball - A-Frame - 15,000 lbs

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

Video Transcript for Bulldog A-Frame Trailer Coupler - Standard Coupler - BD44150W0317 Review

Today we're going to be taking a look at the Bulldog Heavy-Duty Cast Head Coupler. This heavy-duty coupler is ideal for utility, livestock, cargo and construction trailers. You simply attach it to your trailer. It provides a good attachment point of the hitch ball on your tow vehicle. The unit is going to feature a wedge-style latch mechanism that's very secure and easy to use. So it's got the trigger latch lever up here. You can see how that controls that wedge underneath to engage and disengage from the hitch ball. Located right here is the built-in attachment point for a round utility jack.

This is going to give us an inner diameter of 2 1/4 of an inch, and then it's got the pre-drilled attachment points for a bolt on installation of a round utility jack. Those are threaded and ready to receive new hardware, and they're going to be separated on an industry standard of about 3 inches apart from one another. And again, that's gonna have an opening of 2 1/4 inches. But that simply allows for the easy installation of a round utility jack. This coupler is designed for 50 degree A-frame trailer tongues. It's made from a durable steel construction, and it already has a primed finish on it.

It's gray in color, that way you can easily paint this to match the rest of your setup, like your trailer frame or whatever it is your vehicle. That's already been primed, that way you don't have to do priming to it to paint it the color that you want. I also want to point out that it does not come with a coupler pin. You can find a coupler pin and clip or a coupler pin and lock here at But when you lift up this latch mechanism, I want you to notice that the latch does not remain in the open position, but it does provide a set of holes there, so if you have a coupler pin, you can move the latch to the open position, install a pin, and that will keep the unit up, which opens that wedge for your hitch ball. You can also add a coupler pin to it in the down position to increase security between the connection point from the coupler to the hitch ball to the towed vehicle, making sure that this doesn't accidentally disconnect, which that trigger latch design is a nice feature. You have to press in on that to open the latch.

If you don't press in on that trigger, then this will not open. I would recommend using a coupler pin and lock, that way when you leave your trailer unattended, nobody's going to be able to get a lock off of there to connect this to their vehicle and to go off with your trailer. The pinhole diameter is 5/16 of an inch. The usable span or pin length needed, measuring edge to edge right here, you can see that's at least going to be 1 inch. I'd probably go with something a little bit larger than that, maybe 1 1/3 to 1 1/4, just to give you some room in there. This is designed for a 2 5/16 inch hitch ball. The length of the unit, measuring very back to very front, it's going to be around 18 long in overall length.

Again the hole diameter for the round utility jack is 2 1/4 inches, hardware not included, and it's going to offer a 15,000 pound capacity. That's going to do it for today's look at the Bulldog Heavy-Duty Weld-On Cast Head Coupler.

Customer Reviews

Bulldog Heavy-Duty Cast Head Coupler w/ Wedge Latch - 2-5/16" Ball - A-Frame - 15,000 lbs - BD44150W0317

Average Customer Rating:  4.6 out of 5 stars   (16 Customer Reviews)

Durable cast coupler features the easy-to-use Wedge Latch for simple, quick hookup and has a built-in attachment point for round, A-frame utility jacks.


I have been installing these on our work trailers the last couple years. They work great. I'm using this one to convert my 5th wheel car trailer to a bumper pull trailer


My husband loves this hitch. I don't have to worry about it coming unhitched from the bumper like our old one did. It stands true to its name "The Bulldog" He has told several family and friends about it and some of them has ordered them one for their trailers


Ordered a Bulldog coupler and Jack for a horse trailer from a photo I sent in. etrailer rep responded quickly and made a recommendation. It arrived today after only a few days. It's exactly what I needed. Good communications, good price, fast shipping and it fit when it got here. Nothing gets better then that....


As we were traveling, the female 1/2 that was on the trailer (original equipment) popped off the ball, the safety chains held. but took the whole pickup and trailer into the ditch. Luckily no body hurt or too much damage. I learned now that the galvanized pressed tin ones wear out. beware!

I spent the money for a heavy one. Looking at it now that I have it, it is heavier in real life than in the picture. This will solve the problem for the trailers life.


Replaced the original part ( factory installed) because it cracked and just replaced again for the same problem but added a gusit to both sides, fingers crossed

well the trailer has been used twice since it was repaired so not sure how its going last
Thomas - 12/30/2018


Product looks great quality as you see it in the picture is exactly what you get . Got a pair of electronic brakes and they came ready to install no missing pieces overall great company to buy stuff I will recommend people to buy from this company.


Cant get it to let go of ball when disc onnecting.


Very pleased with the products I ordered. The Web site was excellent and my order arrived on time and was in a secure package.


Very pleased with the products I ordered. The Web site was excellent and my order arrived on time and was in a secure package.


Great product. Excellent service from E trailer.


Works as it should. I'm very happy with it.




I ordered parts on Thursday, it was on my porch by Saturday, exactly as ordered and for a reasonable price. Wonderful service.


Great service, I got the part 3 days after ordered


Looks great!


See what our Experts say about this Bulldog A-Frame Trailer Coupler

  • Size and Thread Type of the Mounting Holes for Bulldog Heavy-Duty Cast Head Coupler BD44150W0317
    I went out to the warehouse to take some measurements of Bulldog Heavy-Duty Cast Head Coupler # BD44150W0317 for you. I used some digital calipers and found the diameter of the threaded holes is 0.27 inches. It was not all that easy to measure but I believe that there are 12 threads per inch. The threaded holes have a depth of 0.35 inches and I counted 4 or 5 threads (depending on where you start counting) which would be a minimum of 12 threads per inch. The 0.27 and the thread type makes...
    view full answer...
  • Heaviest Duty A-Frame Coupler Recommendation for Utility Trailer
    The highest capacity coupler we have for an A-frame trailer like what you have is the part # BD44150W0317 which has a 15k capacity and a heavy-duty cast head that is build like a tank. This would be your best option. This also fits the standard hitch ball diameter of 2-5/16 which I believe is what you have since 2-5/8 is not a standard size.
    view full answer...
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  • What is Capacity or Tongue Weight Capacity of Bulldog Heavy-Duty Cast Head Coupler w/ Wedge Latch
    I contacted our representative at Bulldog and he informed me that the tongue weight capacity of the Bulldog Heavy-Duty Cast Head Coupler w/ Wedge Latch, part # BD44150W0317, is from 10 to 15 percent of its weight capacity. So the maximum tongue weight capacity of part # BD44150W0317, is 2,250 pounds. The coupler is capable of towing a loaded trailer that weighs up to 15,000 pounds. The Coupler Capacity must be equal to or greater than the gross trailer weight.
    view full answer...
  • Weight Capacity of Bulldog Heavy-Duty Cast Head A-Frame Coupler BD44150W0317
    The Bulldog Heavy-Duty Cast Head A-Frame Coupler # BD44150W0317 is rated for use on trailers up to 15K GVWR. It does not carry a specific tongue weight (TW) rating (nor do any of the A-frame couplers shown on the linked page) but all can handle the TW of a trailer up to the gross rating.
    view full answer...
  • Solution for Gaining Clearance Between Tailgate and Trailer Jack
    I went out to our warehouse to measure the Bulldog Heavy-Duty Cast Head Coupler # BD44150W0317 that you referenced and found a distance of right at 15-1/4 inches from the front of the coupler to the center of the jack mounting hole. The other available couplers in the capacity range you are needing will have pretty similar measurements. If this is not enough length to give you the needed tailgate clearance then your best option is to go with a longer ball mount for your truck. We do...
    view full answer...
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  • Can Bulldog BD44150WH301 Cast Head Install to A-Frame Constructed of Square Tubing
    As long as the frame of the trailer is a 50ยบ A-frame, the Bulldog Heavy-Duty Cast Head Coupler, part # BD44150WH301 will work regardless of if the trailer frame is constructed of rectangular or square tubing. A weld-on version is also available as part # BD44150W0317. I've linked to product videos for both couplers mentioned above.
    view full answer...
  • Wedge Style Coupler and A-Frame Jack that Fits Circle J Horse Trailer
    The style of coupler you have now on your horse trailer is a Bulldog Collar Lok style which is very common on horse trailers. The Bulldog Wedge Latch Coupler part # BD44150W0317 will fit perfectly on your trailer as thankfully the angles of the couplers and trailer A-frames were all made to the same angle. This means that after you cut off your old coupler this one can easily install in place of it and will work great. For a topwind jack like you have that will fit the new coupler and...
    view full answer...
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  • Weight Capacity Of Trailer Coupler On New Flat-Bed Tandem Trailer
    I have attached a helpful article that explains trailer hitch balls and their capacities. As the article states, 2 inch balls are typically rated with a towing capacity between 3,500 lbs to 8,000 lbs. A 2-5/16 inch ball is normally rated to be able to handle loads between 6,000 and 30,000 lbs. I recommend returning to the dealer that sold you the trailer for a clarification. If you can see the rating on the coupler reads it is rated for 7,000 lbs, that would be for the towing capacity...
    view full answer...
  • BLTL-20 Coupler Lock Fit a Bulldog Coupler Heavy-Duty Cast Head Coupler w/ Wedge Latch
    I went and pulled a coupler like you have part # BD44150W0317 and the coupler lock you are interested in part # BLTL-20 and found that they lock is wide enough to fit this coupler. I attached a picture that shows the two products next to each other to show that they would fit.
    view full answer...
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  • Recommended Lock For Bulldog Collar-lok Coupler With Trailer Hooked to Vehicle
    If you have a bulldog collar-lok coupler with a hole with pin like part # BD028387, you can use Bulldog Easy Access Coupler Lock part # BD580409. The Bulldog Coupler lock allows you to keep the trailer hooked up to the vehicle while locked. This will also work on a Bulldog A-frame coupler like part # BD44150W0317.
    view full answer...
  • Round A-Frame Trailer Jack for 14,000 lb Trailer
    We can definitely help you out here, but let's start with the coupler. You mentioned Bulldog Heavy-Duty Cast Head Coupler with Wedge Latch # BD44150WQ317 but that you had a round jack on your trailer. This coupler has a hole for a square jack so instead, I recommend the Bulldog Heavy-Duty Cast Head Coupler with Wedge Latch # BD44150W0317. This is the same coupler but has a round hole for a round jack. Then for the jack, the great thing is that for an A-frame jack, its capacity only needs...
    view full answer...
  • Are There Replacement Parts for the A-Frame Trailer Coupler w/ Round Jack Hole CA-5280-RB
    I do have weld-on, a-frame trailer couplers in which replacement parts are available but the A-Frame Trailer Coupler w/ Round Jack Hole part # CA-5280-RB is not one of them. The Demco 50-Degree A-Frame Trailer Coupler part # 12660-97SP and Bulldog Heavy-Duty Cast Head Coupler part # BD44150W0317 both have replacement coupler repair kits, the Demco Composite eZ-Latch Repair Kit part # DM6008 and the Repair Kit Fulton Wedge-Latch Cast Head Coupler part # F670801. I recommend the Demco 50-Degree...
    view full answer...

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Info for this part was:

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Written by:
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Employee Michael H
Expert Research:
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Employee Adam R
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Employee Adele M
Updated by:
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