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  1. Gooseneck Coupler
  2. B and W
  3. Round Tube
  4. Coupler with Outer and Inner Tube
  5. 25000 lbs GTW
  6. Auto Latch
B&W Defender Locking Gooseneck Coupler - Adjustable - Round - 2-5/16" Ball - 25,000 lbs

B&W Defender Locking Gooseneck Coupler - Adjustable - Round - 2-5/16" Ball - 25,000 lbs

Item # BWGNC4251
Our Price: $377.47
Gooseneck Coupler
This item qualifies for Free Shipping
Shipping Weight: 42 lbs
Quantity: 
In Stock
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Heavy-duty gooseneck coupler latches and locks automatically. Built-in lock can be engaged when trailer is coupled and when trailer is unattached to help prevent towaway theft. Oversize, cone-shaped funnel eases hookup. 1-800-496-5010 to order B and W gooseneck coupler part number BWGNC4251 or order online at etrailer.com. Free expert support on all B and W products. Great prices and Fastest Shipping for B&W Defender Locking Gooseneck Coupler - Adjustable - Round - 2-5/16" Ball - 25,000 lbs. Gooseneck Coupler reviews from real customers.
  • All Info
  • Reviews (9)
  • Q & A (0)
  • Photos
  • Why etrailer?

B and W Gooseneck Coupler - BWGNC4251

  • Round Tube
  • Coupler with Outer and Inner Tube
  • 25000 lbs GTW
  • Auto Latch
  • B and W
  • 2-5/16 Inch Gooseneck Ball
  • 7500 lbs TW

Heavy-duty gooseneck coupler latches and locks automatically. Built-in lock can be engaged when trailer is coupled and when trailer is unattached to help prevent towaway theft. Oversize, cone-shaped funnel eases hookup.


Features:

  • Gooseneck coupler lets you hook your gooseneck trailer up to your tow vehicle
  • Cone-shape funnel makes it easy to guide ball into socket
    • Coupler engages as long as the ball is within 2" of the socket
  • Automatic latching mechanism for super simple hookup
    • Pull handle out and rotate up to open coupler
    • Line hitch ball up with coupler and drop trailer - internal latch automatically engages
  • Built-in lock provides excellent security
    • Mechanical shutter helps keep dirt and debris out of cylinder
    • 2 Keys included
  • Sturdy steel construction
    • Heavy wall tubing exceeds industry standards
  • Black powder coat finish is corrosion resistant
  • Includes an outer tube that welds onto the trailer
  • Made in the USA


Specs:

  • Ball size: 2-5/16"
  • Range of vertical adjustment: 11"
  • Inner tube diameter: 4"
  • Weight capacity: 25,000 lbs
  • Vertical load limit: 7,500 lbs
  • Limited lifetime warranty


With the Defender gooseneck coupler from B&W, you get the best of both worlds. Not only does this coupler make hookup an absolute snap, but it also defends against trailer theft. The built-in lock can be engaged when your trailer is hooked up to your truck, thus preventing uncoupling. It can also be locked when your trailer is not hooked up, preventing would-be thieves from hooking your trailer up to their gooseneck ball.


B&W Defender Locking Gooseneck Coupler

To begin the process of hooking up your trailer, unlock the Defender. Line the hitch ball in your truck up with the coupler. Because the funnel on the Defender is larger than the average gooseneck coupler funnel, you don't have to be exact when lining your tow vehicle up with your trailer. Just make sure that the ball is within 2" of the coupler's socket.


B&W Defender Gooseneck Coupler Oversize Funnel

Once you have the ball lined up with the coupler, lower your trailer. The funnel will guide the ball into the socket, and the ball latch will engage automatically. You will know that the latch is engaged because the handle will rotate counterclockwise and retract against the coupler's housing. When you confirm that the Defender is properly latched around your hitch ball, simply push the lock cylinder in. When locked, the cylinder will be flush with the coupler's housing.



GNCK4252 B and W Defender Locking Gooseneck Coupler with Outer Sleeve - 25,000 lbs

Installation Details BWGNC4251 Installation instructions


California residents: click here


Customer Satisfaction Score:


Customer Reviews

B&W Defender Locking Gooseneck Coupler - Adjustable - Round - 2-5/16" Ball - 25,000 lbs - BWGNC4251

Average Customer Rating:  4.9 out of 5 stars   (9 Customer Reviews)

Heavy-duty gooseneck coupler latches and locks automatically. Built-in lock can be engaged when trailer is coupled and when trailer is unattached to help prevent towaway theft. Oversize, cone-shaped funnel eases hookup.

by:

I have used etrailer a few times and am 100% satisfied with products and service. I had the pleasure of dealing with customer service on this order as part of my order was backorder. Communication was awesome throughout the process. Great to do business with.




by:

Review from a similar Defender in Gooseneck Coupler


Great coupler - generous sloped diameter allows you to be off by a couple inches and still seat in there fine. Love the locking feature.


Comments
Everything is still great - works like a champ!
Ed - 05/31/2022


by:

Review from a similar Defender in Gooseneck Coupler


I got the hitch Ball/chain package and the Gooseneck hitch post, they were delayed a bit with "covid" problems but once shipped were 3 days early!!! GREAT, thru the process e-Trailer Tori and George were just awesome with contact and updating me all the time.
The BW hitch Ball is 10 times the product the factory Curt ball and chain hooks were is quality, fits tight in the receptacle and I am sure will quiet the "take off and stop" clunk not to mention ease of install and fit overall. I have not installed the gooseneck post yet but the quality is excellent and am looking forward to using it.




by:

Review from a similar Defender in Gooseneck Coupler


installed in minutes. It has been on trouble free for a year now. I am so happy with how it performed i bought a second one for the stock trailer. My wife travels with the truck and trailers constantly. No more complaints about pinched fingers or stuck slide couplers and as far as hooking up." Close" is really" close enough".




by:

Review from a similar Defender in Gooseneck Coupler


Cool...great hitch, hasn't gotten my trailer stolen, good quality




by:

Review from a similar Defender in Gooseneck Coupler



Comments
Great coupler, better than the Bulldog that came on my trailer.
Warren - 02/14/2022


by:

Review from a similar Defender in Gooseneck Coupler





by:

Review from a similar Defender in Gooseneck Coupler





by:

Review from a similar Defender in Gooseneck Coupler




9
9

See what our Experts say about this B and W Gooseneck Coupler

  • B&W Defender Gooseneck Trailer Coupler Extended and Retracted Height Dimensions
    You are correct, I spoke to my contact at B and W and they informed me that the # BWGNC4251 that you referenced has a total of 11 inches of adjustment. The inner tube measures 6.312 inches when retracted and 17.312 inches when fully extended. However we do not recommend towing with more than 12 inches of the trailer coupler exposed.The outer sleeve measures a total of 20 inches. Depending on where the outer sleeve is welded onto the trailer will determine the exact overall height.
    view full answer...
  • Diameter of Outer Tube of B&W Defender Locking Gooseneck Coupler
    The outer tube of the B&W Defender Locking Gooseneck Coupler # BWGNC4251 is 4-1/2 inches. I have added a link to a video review for you to check out as well with some more info on the B&W Defender Locking Gooseneck Coupler # BWGNC4251.
    view full answer...
  • How Does the B and W Defender Gooseneck Hitch Install on a Trailer
    As long as you have an outer tube installed on your gooseneck trailer that is designed to fit an inner tube with a 4 inch diameter the # BWGNC4250 would install pretty easily on your trailer. If not, then you would want the # BWGNC4251 instead as this comes with the outer tube that would get welded to your trailer by a qualified welder. If you didn't want any adjustability with your gooseneck coupler you could always weld the # BWGNC4250 directly to your trailer. Also, the claim that...
    view full answer...
  • Gooseneck Coupler That Is Easiest To Attach To Gooseneck Hitch Ball
    There is one gooseneck coupler with a wide flange that is also the easiest to hook up to your gooseneck ball, which is the B&W Defender Locking Gooseneck Coupler. Not only is the coupler base a full 6 inches in diameter, it is also a funnel, as you can see by the accompanying photo. The funnel means you do not have to be right on top of your gooseneck hitch ball, it only needs to be within 2 inches of the ball to hook up. The coupler can be had with either the inner and outer tube, or...
    view full answer...
    Image 1 for
  • Replacement Coupler For A 1994 Featherlite Horse Trailer
    When it comes to replacing the coupler on your 1994 Featherlite Horse Trailer The B&W Defender Locking Gooseneck Coupler Inner Tube - Round - 2-5/16 inch Ball - 25,000 pounds # BWGNC4250 will work for you if the existing coupler on your trailer has a tube diameter of 4 inches. The coupler has a built-in lock feature that provides excellent security, and has a black powder coat finish which is corrosion resistant. It has a weight capacity of 25,000 pounds and a vertical load limit of 7,500...
    view full answer...
  • Trailer Coupler Recommendation for Gooseneck Trailer to Convert from 3 inch Hitch to 2-5/16
    You would need to replace the gooseneck coupler with one that has a 2-5/16 inch ball size. For that the B and W Gooseneck part # BWGNC4251 is a very popular option that would work well. It has an adjustable height tube and comes with a integrated coupler lock.
    view full answer...
  • Will Blaylock Coupler Lock Fit B&W Gooseneck Coupler
    The B&W gooseneck couplers come in 2 different setups; the Defender parts # BWGNC4250 and # BWGNC4251 as well as the Extend-A-Goose # BWTEXA4200. The Defender couplers have built-in locks and come with keys while the Extend-A-Goose is lockable if you install a padlock in the handle bracket (see attached photos). Because of this the design of the couplers won't fit with a standard coupler lock like the Blaylock # BLTL-50 you're looking at. If you have a different coupler please let me...
    view full answer...
    Image 1 for Image 2 for
  • Options to Lift Gooseneck Trailers for a 2021 Chevrolet Silverado 1500 with 6 Lift
    We likely have what you need to lift your gooseneck trailers, but please note that often times a lift kit will make the capacity of the truck unknown. You can contact the manufacturer of your lift and see if they have any weight ratings. The other issue is that with the lifted truck you may find that you will have some issues getting the trailer level. Some gooseneck trailers have a height adjustable coupler to help compensate. But with the size of your lift, you would need to lift the...
    view full answer...

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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Kristina F
Updated by:
Kristina F
Employee Carrie F
Updated by:
Carrie F

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