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  1. Trailer Hitch Ball
  2. CURT
  3. Trailer Hitch Ball
  4. 2-5/16 Inch Diameter Ball
  5. 1-1/4 Inch Diameter Shank
  6. Standard Ball
2-5/16" Hitch Ball - 1-1/4" Diameter x 2-5/8" Long Shank - Raw Finish - 30,000 lbs
CURT

2-5/16" Hitch Ball - 1-1/4" Diameter x 2-5/8" Long Shank - Raw Finish - 30,000 lbs

Part Number: C40085
In Stock
$38.77
Retail:$52.95
You Save: 27%
Trailer Hitch Ball
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2-5/8" Long x 1-1/4" diameter shank. Fine threads provide superior strength on this raw, machine-finished ball. Designed for heavy-duty towing. Great Prices for the best trailer hitch ball from CURT. 2-5/16" Hitch Ball - 1-1/4" Diameter x 2-5/8" Long Shank - Raw Finish - 30,000 lbs part number C40085 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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CURT Trailer Hitch Ball - C40085

Highlights

  • Heavy-duty towing capability: Rated at 30,000 lbs; ideal for serious towing tasks.
  • Fine thread strength: Offers superior grip and stability under load.
  • Versatile fit: Designed for ball platforms 3/8" to 1" thick.
  • Durable raw steel finish: Heat-treated for longevity, even in tough conditions.
  • Comprehensive assembly: Comes with a lock washer and nut for secure installation.
  • Generous shank length: 2-5/8" shank fits a 1-1/4" diameter hole securely.

Features to know about

Haul the Heaviest Loads with Ease: 30,000 lbs Capacity

If you're looking to tow heavy-duty trailers, this hitch ball is a must-have. With a whopping capacity of 30,000 lbs, this robust component is perfect for tackling the most demanding towing tasks. Whether you're transporting a massive boat or hauling a loaded trailer, you can trust this heavy-duty ball to get the job done without a hitch.

Built for Sturdy, Reliable Connections: Fine Thread Construction

Secure hookups are essential for peace of mind on the road, and the finely threaded shank of this hitch ball ensures just that. Its superior thread grip means your trailer stays connected securely, reducing play and movement, which translates to a safer, more stable ride for both you and your cargo.

Simplify Installation: Nut and Washer Included

Forget drilling holes or purchasing separate parts; this hitch ball comes ready-to-install with a lock washer and nut included. The 1-7/8" socket requirement makes it a straightforward DIY task so you can get back on the road quickly without any hassle or fuss.

Perfect Fit for Various Setups: Shank Specifications

Utilizing a 1-1/4" diameter and a 2-5/8" long threaded shank, this hitch ball fits seamlessly into platforms that are 3/8" to 1" thick. It’s precisely machined to accommodate a variety of setups, ensuring you can adapt it to your particular towing system effortlessly.

Stay Rust-Free: Raw, Machined Finish

While its raw finish provides an authentic, robust look, applying a light grease coating like part # 58117 will keep your hitch ball rust-free and functional in all weather conditions. This straightforward maintenance ensures a quieter towing experience and extends the product's lifespan.

Specs

Specifications

  • Hitch ball diameter: 2-5/16"
  • Fits ball platforms that are: 3/8" to 1" thick
  • Overall height: 5-3/4"
  • Capacity: 30,000 lbs
  • Shank diameter: 1-1/4"
  • Shank length: 2-5/8"
  • Nut requires: 1-7/8" socket or wrench
  • Warranty: 1-Year limited warranty

Note

The hole size on your ball mount must not be more than 1/16" larger in diameter than the threaded shank.

40085 Curt 2-5/16" Trailer Ball - Raw Finish - 30,000 lbs

Replaces 40041




California residents: click here


Video of 2-5/16" Hitch Ball - 1-1/4" Diameter x 2-5/8" Long Shank - Raw Finish - 30,000 lbs

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




Video Transcript for Review of the 2-5/16" Hitch Ball

Today, we're gonna be taking a look at the CURT Ball. So this is a two and five sixteenth inch ball. So one thing you wanna make sure of, is make sure that your coupler is gonna accept this two and five sixteenths inch size, and basically, usually, they are on the coupler itself, so just look on your coupler, it should say it. If it's an older coupler, just make sure it's the right size before you grab the ball. But another thing you wanna think about is the component that is gonna be working with. Obviously, we wanna make sure our vehicle can handle the weight, our hitch can handle the weight, but the ball mount as well.

So with the CURT, we have a 30,000 pound gross trailer weight, and that is gonna give us a max tongue weight of about 3000 pounds. Another thing you need to look at whenever you're looking at balls, is the Ball Mount, is the shank size. So with this shank size, it's about an inch and a quarter in diameter so whatever Ball Mount that you pick, make sure that the hole is gonna be that size, nothing bigger, nothing smaller. Smaller won't fit, and bigger there's gonna be too much play there. But this one is gonna have a shank, which is about two and five eighths inches long.

So it's gonna accept the even thicker ball mounts like this one so from three eighths seven inch, all the way up to an inch thick, this is gonna be a one-piece raw steel machine ball. So one, it looks good, but it's one massive piece they basically to seal and seal this whole entire thing out of a big block of metal. So you know it's gonna be extra, extra strong. A nice thing about this shank is it has really, really fine threads, meaning they're really, really close together. So it's gonna take a couple more rotations to get it locked down into place, but it's gonna make it sure that it's nice and tight.

It comes with the lock, washer, it comes with the big old nut. I do not have a socket or a wrench this size, but it is an inch and seven eighths, so you do wanna torque it down with a torque wrench and you are gonna need to grab an inch and seven eighth socket or wrench to get that all done. To sum it all up, when it comes to hitch balls, there isn't a whole lot of differences, you just wanna make sure that the size is right for your trailer, you wanna make sure that it's gonna be strong enough to hold the weight of your trailer and that goes for all the other components that you pair with it. So you can find all of that on our website. So let's make sure that you pair them all up correctly so you can stay nice and safe.

The limitation to your whole entire setup is gonna be the lowest capacity of whatever component has that low capacity, so just be really careful and mindful of that just to keep you safe, your equipment safe, and everybody else on the road. And that's pretty much it for a look at the CURT two and five sixteenth inch trailer ball..

Customer Satisfaction Score:

Ratings & Reviews

4.9

498 reviews
2-5/8" Long x 1-1/4" diameter shank. Fine threads provide superior strength on this raw, machine-finished ball. Designed for heavy-duty towing.

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Nice heavy duty reasonably priced ball.



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Great delivery service!!



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Fit is perfect. Good quality product



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Show More Reviews

See what our Experts say about this CURT Trailer Hitch Ball

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  • Will a Trailer Hitch Ball with a Raw Finish Last as Long as a Ball with a Chrome Finish
    A chrome finish ball is going to look good but it will not be corrosion resistant. A ball with a machine finish like # C40041, is going to have about the same corrosion resistance. In terms of performance they will wear at about the same rate under normal use. The best balls in terms of corrosion are going to be stainless steel followed by zinc coated balls. But in terms of balls that have a 30,000 pound capacity and a 1-1/4 inch shank, ball # BWHB94004 or # C40085 are the only options....
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  • Overall Height of the 2-5/16" Hitch Ball # C40085
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    The only replacement head that will come close to your specifications will be the Reese # RP58167. This is rated for Reese weight distribution systems up to 1,700 pounds tongue weight and 17,000 pounds towing weight, but only includes one hole for the friction sway control ball. With that said, this is designed to be used Reese products and cannot be used with other brands. Unfortunately, this will go for every weight distribution system manufacturer. If the trunnion bars you have are...
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  • Is there a Ball Mount Larger than a Class V 2-1/2 Inch
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  • What Size Socket or Wrench is Needed for the Nut on Curt 30K Hitch Ball 40085
    I went out to the warehouse and pulled Curt hitch ball # C40085. I took it out to our install bays and grabbed a socket that would fit. It takes a 1-7/8 inch socket or wrench.
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  • What Hitch Ball to Use with TorkLift SuperHitch Magnum for 30,000 lb Weight Rating
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Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Kathleen M
Installed by:
Kathleen M
Employee Adam E
Installed by:
Adam E
Employee Laura H
Written by:
Laura H
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Amanda M
Updated by:
Amanda M

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