bing tracking image
  1. A-Frame Trailer Coupler
  2. etrailer
  3. 2 Inch Ball Coupler
  4. Weld-On
  5. 5000 lbs GTW
  6. Standard Coupler
A-Frame Coupler with Black Paint Finish - 2" Ball - 5,000 lbs

A-Frame Coupler with Black Paint Finish - 2" Ball - 5,000 lbs

Item # CA5100B
Our Price: $28.27
A-Frame Trailer Coupler
Orders above $99 qualify for Free Shipping
Shipping Weight: 7 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Need help with installation?
Locate installers near me
Standard A-frame coupler is constructed of durable steel and features a traditional, easy-to-use trigger latch for quick and secure hookup. 1-800-940-8924 to order etrailer a-frame trailer coupler part number CA5100B or order online at Free expert support on all etrailer products. Great prices and Fastest Shipping for A-Frame Coupler with Black Paint Finish - 2" Ball - 5,000 lbs. A-Frame Trailer Coupler reviews from real customers.
  • All Info
  • Reviews (80)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

etrailer A-Frame Trailer Coupler - CA5100B

  • 2 Inch Ball Coupler
  • Weld-On
  • 5000 lbs GTW
  • Standard Coupler
  • etrailer
  • Trigger Latch

Standard A-frame coupler is constructed of durable steel and features a traditional, easy-to-use trigger latch for quick and secure hookup.


  • Quick, easy and secure trigger-style latch
  • Weld-on application for A-frame trailers
  • Durable steel construction
  • Built-in jack attachment port
  • Black paint finish
  • Requires (3) 3/8"-16 bolts for installation (not included)


  • Application: A-frame trailer
  • Ball size: 2"
  • Hole diameter for jack: 2-1/4"
  • Capacity: 5,000 lbs
  • 1-Year warranty


CA5100B A-Frame Coupler - 2" Ball - Black Paint Finish

Video of A-Frame Coupler with Black Paint Finish - 2" Ball - 5,000 lbs

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

Video Transcript for etrailer A-Frame Trailer Coupler - Standard Coupler - CA5100B Review

Today we're going to take a look at the A frame trigger latch coupler with the black powder coat finish, for a two inch hitch ball. This A frame coupler will let you hook up your trailer to you tow vehicle, provide you a connection point for the hitch ball. Now this uses a trigger latch design, which allows for safe and easy coupling and uncoupling of your trailer to the hitch ball. Basically you just put your finger on the trigger latch right here, pull up on it, then pull up on the latch itself, and that'll open up the ball socket underneath. Basically the way to install it, I happen to pull here a two inch diameter hitch ball. Basically you just drop it with it in the open position, you drop the coupler right on to the hitch ball, and then just fully completely close your trigger latch. As you do that, the trigger latch will actually lock into place right there, and then you're all attached, ready to go.

If you want to, the hole right here will allow for a coupler lock to go through, for extra security. To release it, just pull up on the trigger latch, lift the latch up and it'll release it from the hitch ball. This is made of a sturdy steel construction, has a nice black powder coat finish, to provide corrosion resistance. It is an A frame design, so it is designed to mount to a fifty degree trailer tongues. It is a weld-on installation, it is also SAEJ684 certified. If you notice the hole here in the back, that is your built-in jack attachment point, allows for quick, easy mounting of a round utility jack.

The hole diamter right there, I'll put a measurement on it for you, it's going to be right at two and a quarter inches. You also notice there's three threaded holes right here for installation of the jack, so it will require three, three eighths by sixteen inch sized bolts for installing your jack to this. Again, this is designed to fit a ball size of two inches, total weight capacity on it is five thousand pounds, tongue weight capacity is seven hundred pounds. The pinhole diameter right here, which is designed for the coupler lock is five sixteenths of an inch, and just to give you some overall dimensions, the width from edge to edge is going to be right at ten inches. The length from this end to this end is going to be right at thirteen and three eighths inches long. That should do it for the review of the A frame, trigger latch coupler, with the black powder coat finish, for the two inch hitch ball..

Customer Satisfaction Score:

Customer Reviews

A-Frame Coupler with Black Paint Finish - 2" Ball - 5,000 lbs - CA5100B

Average Customer Rating:  4.9 out of 5 stars   (80 Customer Reviews)

Standard A-frame coupler is constructed of durable steel and features a traditional, easy-to-use trigger latch for quick and secure hookup.


Fit right up. Heavy duty!


just what I needed to fix my trailer


I have be buying my trailer parts from etrailer for the last 5 trailers
and I'm very pleast with the secvice and products


Quality All around! Welded up beautifully on my trailer. ????


Only intermittant use, but coupler still working well. Just one word of advice, if you are going to use it on a trailer that is going to be pulled by an ATV, the location of the hole for the trailer jack ends up making the trailer jack too close to the back of the ATV, where I can't put the coupler on the ball on the ATV. I was able to solve this by getting an extension piece (basically part C45006) for my ATV to move the trailer back a bit from the back of the ATV. This would be a problem with any A-frame coupler though.


fast shipping great stuff


I purchased items to build 2 complete trailers, including axles, springs, hitches, lights and wiring etc. The service was outstanding! The items were delivered on time and correctly.
I was also quite surprised with their very good pricing. In total, my items weighed in excess of 200 lbs., and yet I spent less having these things shipped to California from this company than I would have at my local area stores.
Without doubt, I will use this company again when I need these types of products.


It might be possible to give 5 stars but after purchasing all the products about a year ago, my little fiberglass trailer is not even close to being ready. All the lighting is hooked up and they all seem to work, so that's a good thing. The other products that I purchased have not been installed yet.
I would like to mention how pleased I am with e-trailer videos showing everyone how their products look and how they're used. Keep it up, I am a happy customer.



The coupler that came with my trailer was slightly misshapen, causing a back and forth jerking motion within the tow vehicle. We ground off the old one and welded on this new one - problem solved! I especially like that the mechanism on this coupler is both adjustable and easy to hook up and unhook.


I just used the handle and the internal parts but the price was not bad and the shipping was not that expensive. I was quoted $85.00 and Shipping and headlining from the local RV place at $100.00. After paying $18.95 and shipping of around $9.00. Now I can go on my next camping adventure after saving $72.00. I even called e-trailer and the lady was very helpful and very friendly. In the future I will be doing more business with e-trailer. Thanks.


i purchased 3 A-couplers. I was very pleased with the transaction as a whole. The shipping was "free"! How can you not like that's? Would reccomend and encourage others to purchase etrailer products!

A happy Customer,
Gary H.


The product was exactly as described. The fit and function are excellent, the price was good and so far the hitch has worked perfectly.


Great stuff to work with. Pallet racks and etrailer parts


I dealt with Chrystal; very helpful and professional. The trailer parts arrived promptly and in good condition. I would buy from etrailer again. Today I ordered steel and will begin building a 5X8 utility trailer.


etrailer always comes through. Their customer service is second to none.


Work great and fast shipping
I will
come back if I need more trailer parts.


This item is exactly what I wanted and the price was very inexpensive. Also, even though I asked for standard UPS shipping, it showed up the next day. What a great experience with!!


Have used the trailer on 3 road trips between San Jose Ca and Reno NV over the path year and have no complaints.


The coupler was very nice! We love you prices. There was fast shipping. Will buy from you again!


The hitch is exactly as pictured. It strong enough to hold up, and it was shipped quickly. I am happy with the purchase.


Solid and well crafted. A much better choice than sanding and repainting the old coupler. Thanks e-trailer!


Service was excellent throughout product order process. Product was high quality, fit perfectly for welding and was priced lower than comparable brands.


Product was exactly what I needed, thanks so much for prompt shipping and excellent service.

I will continue to use E trailer in the fuutre.



This is a great replacement piece at an extremely affordable price. The hardest part is getting the old one off! Make sure you have good welder install this for you!


Haven't completed trailer yet.

Show More Reviews

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

  • Replacement Trailer Coupler Repair Kits for 2-Inch Couplers
    Coupler Repair Kit # CA-5100-RK includes all parts needed to rebuild an etrailer brand or Ram brand 5K-rated 2-inch ball coupler with a trigger latch. It consists of all components other than the housing. If you have one of these models - # CA5100B, # CA-5100-Z or CA-5100-BLB - then this is the correct rebuild kit. If you have another brand or model of coupler on your trailer you can refer to the linked page that displays all such kits for many brands of coupler. The Big Tex website...
    view full answer...
  • Replacement for Shelby 5101 Coupler
    Based on my research the Shelby 5101 is an A-frame coupler with a 2" ball and 5,000 lb capacity. We have exactly that with the A-Frame Coupler # CA5100B, which has a trigger latch and has a black paint finish. The same coupler is available with a simple zinc finish, part # CA-5100-Z. I've added links to video reviews of both couplers for you to take a look at.
    view full answer...
  • Best Replacement for Shelby 5101 A-Frame Coupler
    There are no repair kits for Shelby couplers because the company was acquired some time ago; your best option at this point would be to get a new coupler. The Shelby 5101 is an A-frame coupler with a 2" ball and 5,000 lb capacity. We have exactly that with the A-Frame Coupler # CA5100B, which has a trigger latch and has a black paint finish. The same coupler is available with a simple zinc finish, part # CA-5100-Z.
    view full answer...
  • Shelby 5101 Coupler Replacement
    There are no repair kits available for the discontinued Shelby 5101 coupler; your best option is to replace the coupler. The Shelby 5101 is an A-frame coupler with a 2" ball and 5,000 lb capacity; we have exactly that with the A-Frame Coupler # CA5100B, which has a trigger latch and has a black paint finish. The same coupler is available with a simple zinc finish, part # CA-5100-Z.
    view full answer...
  • Replacement Coupler For A Shelby 5101 A-Frame Coupler
    There are no repair kits available for your Shelby 5101 a-frame coupler because Shelby was discontinued. Your best option would be to get a new coupler. The A-Frame Coupler # CA5100B has a quick, easy and secure trigger-style latch and has a durable steel construction with a black paint finish with a weight capacity of 5,000 pounds, or # CA-5100-Z has the same features but it has a zinc finish. I attached a review video link below.
    view full answer...
  • Correct Replacement for Shelby 5101 A-Frame Trailer Coupler
    We do offer a direct replacement for the Shelby 5101 A-Frame Trailer Coupler, it's the A-Frame Coupler part # CA5100B for black or part # CA-5100-Z for zinc. These couplers both have a 5,000 lb weight capacity with 2" hitch ball. In order to install either option you'll need to cut the old one off and weld the new one onto the trailer. Please note, the zinc is a better option for boat trailers due to its rust resistance.
    view full answer...
  • Replacement Weld-On Coupler For A-Frame Trailer
    The A-Frame Coupler, part # CA5100B is a weld-on coupler that will fit a 2 inch trailer ball. This coupler has a 5,000 lb weight capacity, and also features a 2-1/4 inch diameter hole for a jack to be mounted. I have attached a photo of this coupler with some dimensions noted you can check out. And I have attached a link to a product review video for this coupler.
    view full answer...
  • Trailer Tongue A-Frame Angle Compatible with CA5100B A-Frame Coupler
    Because they consider it proprietary information, the manufacturer will not provide a build sheet or detailed drawing of the # CA5100B. I believe you're needing the angle of the A-frame trailer tongue which would be equal to the angle of the two sides of the coupler which is 50 degrees, as shown in the photo I've provided.
    view full answer...
    Image 1 for
  • Trailer Ball is Loose in Coupler
    Some couplers can be adjusted so that the wedge will grab the trailer ball more tightly, but since the coupler you're using has no adjustment available, I'd first confirm that you are using the correct trailer ball size for your coupler. The required ball size for the coupler should be stamped into the metal on the top of the coupler. If you were using a 1-7/8 trailer ball with a coupler designed for a 2 inch ball, it would explain why the ball is loose in the coupler. If this is the case,...
    view full answer...
  • What Are The Dimensions of Redline A-Frame Trailer Coupler # CA5100B
    I walked out to our warehouse and pulled the Redline A-Frame Trailer Coupler # CA5100B. At the widest point inside the coupler measured approximately 9-1/4 inches, the narrowest approximately 2 inches and 8 inches between those points. Check out the picture that I have attached that I added dimensions to for you to view. This coupler is a weld-on application for A-frame trailers, works with 2 inch hitch balls and has a 5,000 lb capacity. Also linked is an FAQ on trailer couplers.
    view full answer...
    Image 1 for
  • Installation Information for Redline A-Frame Trailer Coupler # CA5100B
    When installing a trailer coupler like the Etrailer A-Frame Trailer Coupler, part # CA5100B, you want the coupler right up against the edge of the trailer frame. This coupler is a weld-on coupler for A-frame trailers. I would recommend having a qualified welder or trailer professional install the coupler. I have linked an FAQ on trailer couplers and all of the A-Frame trailer couplers we have available.
    view full answer...
  • Replacement Coupler Recommendation for Fulton 33305
    It doesn't look like we have an exact replacement coupler latch kit available for your trailer coupler. Your best option would be to replace your coupler with something like the # CA5100B which is also a A-frame coupler designed for a 2 inch ball but it has a 10k capacity.
    view full answer...
  • Tongue Angle of the A-Frame Coupler Part # CA5100B
    The A-Frame Coupler with Black Paint Finish part # CA5100B works with a-frame trailers that have a tongue which comes together at a 50 degree angle (Industry Standard). This coupler will attach to a 2" hitch ball and has a 2-1/4" diameter pilot hole for trailer jacks. I have attached a photo of the coupler angle for you as well.
    view full answer...
    Image 1 for
  • Dimensions of A-frame Coupler CA5100B
    The coupler part # CA5100B measures 9-1/4 inches wide and 8 inches tall where it attaches to a standard a-frame. The narrowest part of the angle of the coupler is 2". I have attached a diagram to show you the dimensions.
    view full answer...
    Image 1 for
  • Tongue Weight Capacity Of A-Frame Coupler with Black Paint Finish CA5100B
    The tongue weight capacity of the A-Frame Coupler with Black Paint Finish part # CA5100B is 700 lbs.
    view full answer...
  • How Wide are A-Frame Trailer Couplers CA5400 and CA5100B
    Coupler # CA5100B measures 9-1/4 inches wide at the widest part. I have included a picture showing some dimensions for you. For coupler # CA5400 is measures 11 inches wide at the widest point. I have included links to the video reviews of these couplers for you.
    view full answer...
    Image 1 for Image 2 for
  • Replacement for Pro Series A-Frame Trailer Coupler with Broken Latch
    If the trigger broke on your Pro Series A-Frame Trailer Coupler # PSE338050303 then you would need to replace the whole unit. I reached out to my contact at Pro Series who said that they unfortunately do not have carry any replacement parts for this coupler. A similar option would be the A-Frame Coupler # CA5100B which also has a 5,000 lb weight capacity and is compatible with 2" hitch balls. The latch system is a little different but because of this there is a replacement part # CA-5100-RK...
    view full answer...
    Image 1 for
  • Trailer Coupler Lock Recommendation When MasterLock and DeadBolt are Too Long
    If you want a bar and key style lock like the deadbolt, the smallest span that will still fit your coupler is 2 inches. So you will have 3/4 inches left over. Since you have already tried MasterLock and Deadbolt, maybe you would be interested in a different type of lock. I have included a link to our coupler lock main page for you to view. You might find something like the Gorilla Guard, # 63227, will give you a better fit.
    view full answer...
  • Availability of an A-Frame Coupler that will Fit a 1-7/8 Inch Hitch Ball
    We don't offer any A-Frame style couplers that are compatible with a 1-7/8 inch trailer ball. The best bet if you're wanting to use a coupler like the # CA5100B you referenced would be to remove the 1-7/8 inch trailer ball you currently have and switch to a 2 inch ball. You'll want to make sure that the 2 inch ball you choose has a shank diameter that's compatible with your existing ball mount. 2 inch trailer balls are available with shanks measuring 5/8, 3/4, 1 or 1-1/4 inch diameter....
    view full answer...
  • Replacement A-Frame Trailer Coupler for Pro Series A-Frame Coupler
    We have verified with the manufacturer previously that there are no repair kits for the Pro Series A-Frame Trailer Coupler with Trigger Latch # PSE338050303, so the if you latch is busted that does mean you'll need to get a new coupler. Thankfully these aren't terribly pricy, and if you want an option for a similar coupler that does have a replacement latch, I recommend the A-Frame Coupler with Black Paint Finish # CA5100B. This coupler has the same 5,000 lb weight capacity and couples...
    view full answer...
  • Coupler Replacement for Damaged Atwood A-Frame Coupler
    Atwood is no longer in the coupler business so we can't get you the repair kit you are in need of. The best solution we can offer is a similar a-frame coupler that fits a 2 inch ball like the etrailer # CA5100B.
    view full answer...
  • Troubleshooting Coupler Difficulties With A 2015 Jayco Jay Flight 26BHS Travel Trailer
    The Repair Kit for etrailer and Ram A-Frame Couplers # CA-5100-RK only fits the following couplers # CA5100B, CA-5100-BLB, and # CA-5100-Z, so it would not solve your connection difficulty, unless you had one of these specific couplers. Aside from lubing the hitch ball the only other solution would be to replace your coupler with an easier coupling design like the Demco A-Frame Trailer Coupler w/ Jack Hole - eZ-Latch # DM14793-97 or the weld-on version # DM14791-97. The eZ-Latch coupler...
    view full answer...
    Image 1 for
  • Recommended A-Frame Jack And A-Frame Coupler For Custom Boat Trailer
    We don't have any A-frame jacks with the outer tube measurement of 1-3/4 inches. All of our standard jacks have a minimum of a 2 inch inner tube and 2-1/4 inch outer tube diameter like you find on the Round A-Frame Trailer Jack - Topwind - 14-3/4" Travel - 2,000 lbs, # TJA-2002-B. These jacks come in a wide variety of capacities and with different foot or wheel options. My recommendation because you do have the mounting flange measurements is to get the proper jack for your capacity...
    view full answer...
  • A-Frame Coupler and Trailer Jack Replacement for Shelby 5101 Trailer
    I looked up your Shelby 5101 trailer and it is an a-frame trailer that has a weld on a-frame coupler that has a jack mounting hole built into it. So since the coupler uses a non-standard bolt pattern for the jack I'd recommend replacing the coupler and jack together like with the # CA5100B for a coupler and then for a jack the # TJA-5000S-B would be a great option.
    view full answer...

< Previous

Do you have a question about this A-Frame Trailer Coupler?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate a-frame trailer coupler information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Patrick B
Installed by:
Patrick B
Employee Jeff D
Installed by:
Jeff D
Employee Michael H
Expert Research:
Michael H
Employee Reno H
Expert Research:
Reno H
Employee Jameson C
Expert Research:
Jameson C
Employee Adele M
Updated by:
Adele M
Employee Wilson B
Updated by:
Wilson B
Employee Ronnie R
Updated by:
Ronnie R

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.