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  1. Trailer Hitch Ball Mount
  2. CURT
  3. Fits 3 Inch Hitch
  4. Fixed Ball Mount
  5. Drop - 6 Inch
  6. Rise - 4 Inch
Curt Heavy Duty Forged Ball Mount for 3" Hitches - 4" Rise - 6" Drop - 21,000 lbs

Curt Heavy Duty Forged Ball Mount for 3" Hitches - 4" Rise - 6" Drop - 21,000 lbs

Item # C45431
Our Price: $105.18
You Save: $57.77
Trailer Hitch Ball Mount
Shipping Weight: 25 lbs
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Heavy-duty, 1-piece forged ball mount measures 10" from center of hitch pin hole to center of ball hole. Use this Class V accessory in either the drop or rise position to fit your application. Great Prices for the best trailer hitch ball mount from CURT. Curt Heavy Duty Forged Ball Mount for 3" Hitches - 4" Rise - 6" Drop - 21,000 lbs part number C45431 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (328)
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  • Videos (2)
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CURT Trailer Hitch Ball Mount - C45431

  • Fits 3 Inch Hitch
  • Fixed Ball Mount
  • Drop - 6 Inch
  • Rise - 4 Inch
  • No Ball
  • 21000 lbs GTW
  • Class V
  • CURT
  • Steel Shank - Matte Black
  • 1-1/4 Inch Ball Hole Diameter

Heavy-duty, 1-piece forged ball mount measures 10" from center of hitch pin hole to center of ball hole. Use this Class V accessory in either the drop or rise position to fit your application.


  • Ball mount lets you hook up your trailer to your tow vehicle
    • Shank slides into your vehicle's hitch receiver
    • Ball platform provides mounting point for hitch ball (sold separately)
  • Solid, 1-piece forged steel construction
  • Corrosion-resistant, carbide black powder coat finish
  • Both drop and rise positions available to ensure level towing
  • Hitch pin and clip or hitch lock sold separately


  • Application: 3" x 3" trailer hitch receiver
  • Maximum gross trailer weight: 21,000 lbs
  • Maximum tongue weight: 2,800 lbs
  • Length: 10" from center of hitch pin hole to center of ball hole
  • Rise: 4" from top of inside of hitch opening
  • Drop: 6" from top of inside of hitch opening
  • Ball hole diameter: 1-1/4"
  • Limited lifetime warranty

How to Measure Drop on Standard Ball Mount

45431 Curt Industrial Duty Forged Ball Mount for 3" Hitches - 4" Rise - 6" Drop - 21,000 lbs

Video of Curt Heavy Duty Forged Ball Mount for 3" Hitches - 4" Rise - 6" Drop - 21,000 lbs

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

Video Transcript for Curt Forged Ball Mount Review

How's it going everybody Clayton here at Today, we're going to be checking out the Curt Forged Ball Mount for two and a half inch hitches. Now this ball mount is going to be pretty awesome because it's going to be a solid shank. Now, this is what it's going to look like when it's installed on our hitch. And I do suggest picking up a locking pin, you can find those here at etrailer. That's just going to help protect our investment.

This is what our ball mount is going to look like whenever it's not being used in our vehicle. As you can see, it's pretty beefy, and that's good. We're going to get a really high weight capacity. But we'll get into the weight capacity here in just a second. But taking a look at the end of our ball mount, you're going to see that there's no opening.

That's going to be because it's forged out of a solid piece of metal, giving it a lot more strength. A lot of the other ball mounts out there on the market, are going to have an opening back here in the back, and that's just going to be a point of failure, because whenever these start to rust, that's a really good area for that rust to get in there and really corrode our ball mount. So like I said, this ball mount is going to give us a really high weight capacity. As far as towing, we're going to have a 20,000 pound towing capacity. So that's going to be how much the ball mount can actually pull.

We're gonna have a 2,700 pound tongue weight rating. Now chances are that this ball mount is actually gonna be rated a lot higher than your vehicle. So you need to check with your vehicle's owner's manual, and make sure that it's rated to tow at these capacities. If there is a difference, always go with the lowest number between the two. And this weight capacity is going to vary on which ball that you have installed.

Our ball mount isn't going to come with an actual hitch ball, so you will need to pick one up here at etrailer, whether that be two inch or two and five sixteenths. We can now take a closer look at our ball mount. You will notice that the finish is quite a bit different on here than your traditional ball mount. And that's because this is going to be a black carbide finish. And the black carbide is going to hold up to rust and corrosion and a lot better over time, and that's just going to extend the life of our actual ball mount. Now when you do compare that to a lot of other ball mounts or any hitch mounted accessories out there on the market, they're going to use a black powder coat or some sort of powder coating and finish. And powder coating is good, but the problem is when ever that rattles around in a receiver tube opening, it's going to knock off some of that powder coating, creating a place for rust. That's what really is so good about this black carbide. It's just so much more durable, and I really just like the way that it looks. And our ball mount is going to use a standard five eighths pin. So that's really nice because they're very common. And as far as installing our ball mount into our receiver tube opening, it's going to mount just like any other hitch mounted accessory. Simply just slide it in until your pin hole lines up. Our ball mount is going to give us a four inch drop. That's going to be four inches from the top of the ball mount here, down to the platform. This is very important for whenever you're pulling a trailer because you want that trailer as level as possible. So you just want to make sure that the four inch drop is going to be appropriate for your trailer. And if you do need to use this in the rise position, we are going to get a two and a half inch rise. And another important dimension of our ball mount, is going to be from our pin hole opening to the center of our ball. And in this case, it's going to be eight and a half inches. You just want to keep that number in mind if you're using it on anything that has a bumper that kind of hangs over, just so you know you have enough ground clearance. And as far as the dimensions on the ball, you're just going to need to pick up a ball that has an inch and a quarter shank. That way, it fits nicely into the platform of our ball mount. You can find a whole lot of options here at etrailer. This is going to be a great option for you guys that are pulling the same trailer all the time. A lot of the adjustable ball mounts out there have a lot of moving pieces, a lot of things to lose or break. So if you do happen to be pulling the same trailer, this is probably going to be the best option for you. And with our coupler locked down, we're now ready to hit the road. That's going to do it for our look at the Curt Forged Ball Mount for two and a half inch hitches..

Customer Satisfaction Score:

Customer Reviews

Curt Heavy Duty Forged Ball Mount for 3" Hitches - 4" Rise - 6" Drop - 21,000 lbs - C45431

Average Customer Rating:  4.9 out of 5 stars   (328 Customer Reviews)

Heavy-duty, 1-piece forged ball mount measures 10" from center of hitch pin hole to center of ball hole. Use this Class V accessory in either the drop or rise position to fit your application.


Awesome heavy duty ball mount. Used it about 15 times before it was stolen off the back of my truck. Indestructible and great value for the $$.



Replaced the stolen one with the same hitch. It’s built like a tank, tows like a champ, and keeps people off your bumper.


Exactly what you would expect. A massive chuck of metal for use in a 3 inch receiver without hte need for reducers and the issue and rattling they can cause. Sure, and adjustable may be more versatile if you have multiple trailers of different heights, but they are 3 times the cost, or more.




Product was exactly as pictured and described. Having just purchased a 2019 F-350 dually that did not have the 3” hitch. I’ll be using this hitch to pull a utility trailer from Utah to New Mexico to retrieve some personal items.


Has 1/8 inch of play side to side and up and down

Etrailer Expert

Jenny N.


I have a solution for you to help minimize movement in the receiver. I would recommend part number # BLU85QR. It will help to eliminate the rattle and sway within your receiver.


Everything was shipped just like they said and couldn't expect anymore.



very good service






Heavy duty and ball mounted saves me the hassle. The new F350’s are taller and had to make adjustments for the cargo trailer and 5th wheel. I can count on etrailer to have what I need.


I tried twice to get this hitch and ball from [online vendor]. Twice the shipment was lost and I had to get a refund. Shipment from etrailer is right the first time and arrived quickly. Plus, since the ball is already torqued on the ball mount, I don't need to by a large socket.


Very solid and heavy duty ball mount. Added benefit of being able to buy the ball already secured to the mount. Could not find the 6” drop mount, especially for 2.5” receivers, at local stores. etrailer has it all and ships fast!


For years ive had the 2 inch version and it has been the best hitch ive ever used. My new truck came with a 2 1/2 receiver so i upgraded instead of using the adapter and i am pleased so far. Exactly what i had expected, great product.


We’ve already installed it and hitched up the horse trailer. Works great for my needs. Half the weight of the much heavier weight distribution system we had been using (and will continue to use for Interstate travel). Hook up was fast and easy.


Joshua K, the Customer Service Rep with whom I called in and spoke with gets a bazillion stars. The online description doesn’t include if it is qualified to give rise or not.

Josh checked through the product description and figured I could remove the ball, invert it (and recalibrate) and get 5“ of rise. Josh assured me after checking my zipcode that even when selecting free shipping I would have it by the weekend. I ordered on Tuesday morning and it arrived Thursday - 2 days later!

I unpacked the box and was pleased to read that it is qualified for 5“ rise. Very assuring since I wasn’t sure and trailering can be stressful as is.

I really appreciate Joshua K’s customer service. Thanks for making this an efficient and pleasant experience!


Awesome company and so easy to work with. Fast and polite and knew exactly what I need to get.


Arrived sooner than expected. A very sturdy hitch with pin. I especially appreciate having the rounded edges where we frequently walk at the back of the SUV. 4" drop is correct to match my truck and trailer hitch height on my Subaru Ascent.


Everything, when I need something for my truck I always turn to etrailer. They make it so easy to get the product you are looking for. The quality of their product and the Customer service are the BEST! Thank you.


Well packaged, arrived promptly, and exactly as described. Solid ball mount that I’m confident will last longer than my truck.


One solid piece of steel. Works and looks great. I’ve had several people ask me the brand and where it came come.


I truly appreciate the quick turn around time of my order, in addition to the professional/nice email that was sent to me...this goes a long ways! Thank you!


Works great for our camper and dump trailer. Super heavy duty!

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jacob T
Video Edited:
Jacob T
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
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Kristina F
Employee Mike S
Updated by:
Mike S
Employee Isabelle B
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Employee Amanda M
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