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

2-5/16" Hitch Ball - 2" Diameter x 3-1/2" Long Shank - Machined - 30,000 lbs

Item # C40088
Retail:$75.62
Our Price: $51.89
You Save: 31%
Trailer Hitch Ball
Shipping Weight: 8 lbs
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Durable machine-finished steel ball has a 2" diameter x 3-1/2" long shank. Coarse threads on shank are durable and allow quick, simple tightening of nut. Lock washer and nut included. Great Prices for the best trailer hitch ball from CURT. 2-5/16" Hitch Ball - 2" Diameter x 3-1/2" Long Shank - Machined - 30,000 lbs part number C40088 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (3491)
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  • Videos (1)
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CURT Trailer Hitch Ball - C40088

  • Trailer Hitch Ball
  • 2-5/16 Inch Diameter Ball
  • 2 Inch Diameter Shank
  • Standard Ball
  • 30000 lbs GTW
  • Class V
  • Raw Steel
  • CURT
  • 3-1/2 Inch Shank Length

Durable machine-finished steel ball has a 2" diameter x 3-1/2" long shank. Coarse threads on shank are durable and allow quick, simple tightening of nut. Lock washer and nut included.


Features:

  • Hitch ball provides a connection point for your trailer's coupler
  • Coarse threads (4-1/2 threads per inch) are resistant to stripping and allow fast, easy tightening of nut
  • Heat-treated steel is durable
  • Raw, machine finish
  • Lock washer and nut included


Specs:

  • Ball diameter: 2-5/16"
  • Shank dimensions: 2" diameter x 3-1/2" long
  • Weight capacity: 30,000 lbs
  • Fits ball mount platforms at least 3/8" thick
  • 1-Year limited warranty


40088 Curt 2-5/16" Hitch Ball with Long Shank - 30,000 lbs GTW - Machine Finish

Replaces A-91 40091





Video of 2-5/16" Hitch Ball - 2" Diameter x 3-1/2" Long Shank - Machined - 30,000 lbs

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




Video Transcript for Curt Hitch Ball - Trailer Hitch Ball - C40088 Review

Today we're going to be taking a look at the 2-5/16" hitch ball from Curt. This ball provides a connection point for your trailer's coupler. It's going to feature steel construction with a raw machine finish. The shank features a coarse thread design so that's going to be five threads per inch. It does come with the lock washer and the nut for installation. The nut, from edge to edge, flat to flat, measure 2-15/16".

The ball diameter is a 2-5/16" ball. When it comes to the dimension of the shank, starting with the diameter, measuring edge to edge, it's going to give us a diameter of 2". The length of that shank, from the bottom of the ball platform to the end of the threads, it's going to be about 3-1/2" long, and this ball provides a capacity of 30,000-lbs. That's going to do it for today's look at the 2-5/16" hitch ball from Curt.

Customer Satisfaction Score:


Customer Reviews

2-5/16" Hitch Ball - 2" Diameter x 3-1/2" Long Shank - Machined - 30,000 lbs - C40088

Average Customer Rating:  4.9 out of 5 stars   (3491 Customer Reviews)

Durable machine-finished steel ball has a 2" diameter x 3-1/2" long shank. Coarse threads on shank are durable and allow quick, simple tightening of nut. Lock washer and nut included.

by:

I needed the ball in 5 days so I chose 3 day shipping and got it within 24 hrs of order time. I had been looking for a ball like this all day online and couldn't find it until I got on e trailers web site, awesome experience.



by:

We had a ball get loose a egg the hole. I redrilled the hole to a 2” and installed this one with a 2” shank. Perfect fit. Fixed our problem



by:

The product is what I needed. But the customer service was second to none. I needed this particular sized ball for my fifth wheel. The RV dealer did not carry it, they suggested a competing online company. To order from that company I needed to become a member. I ordered this hitch, it was sent the next day, and I got this in two days. In that time frame the other company just got back to me about setting up a membership. I am not a dealer, so I don't want to be forced to a membership. Thank you etailer for making the process simple and faster than my "prime" member ship.



by:

Perfect! I took my truck to three different trailer/hitch "stores" here in the Tulsa area. No one could help me with the ginormous threaded thing in the bed of my truck. All I got was "Nope, we ain't got nutin like that there. That's and old system; older an' the truck is". Went online here, found what I needed, ordered it and it was here in just a few days! Thank you, etrailer! It fits perfectly and is exactly what I needed!



by:

Couldn’t find the size I needed until I found etrailer.com. Fast service and a quality product. Thanks etrailer.com.



by:

The ball I ordered was heavy-duty and exactly what I needed. It was shipped right away. I am very happy with the product and the service I received.

Albert W.

2/14/2017

Works great. Especially with my Anderson hitch. You couldnt tell there was 26,000 lbs. back there.



by:

PRODUCTS ARE GREAT AND DELIVERED FAST.HIGHLY RECOMMEND



by:

Exactly as advertised, and very good response time. Received in a couple of days. Would highly recommend.



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As advertised and great shipping. Excellent customer service.



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exactly what I needed



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This is the perfect hitch ball to match the capacity of the hitch on my Class A Motor Home, giving me a margin of safety for the entire towing system when pulling my car / dolly.



by:

Not all 2" Hitch Balls are the same. I didn't realize until I started comparing them, but based on the size of the shank, the towing capacity can vary wildly. This 2" ball is rated at 10,000 lbs. I could not find a 2" ball anywhere locally that was rated this high, and it was an excellent price here.



by:

The Curt receiver, ball mount, ball, and wiring harness were all of excellent quality. Receiver bolt holes were perfectly aligned with SUV holes. Sturdy, heavy, and confidence building knowing my hitch is well built. I will now have peace of mind pulling a trailer.



by:

Still working great after a year mounted on our Draw-Tite 4285 Ball-Mount/draw bar. Be aware that it may require professional help to mount it to the required 450 lbs of torque. I managed to use a "cheater bar" plus torque wrench to do it myself with 75 lbs of arm strength applied to the wrench, as shown in pics. I had to support our hitch on blocks, since 450 lbs of force exceeds our hitch's 350-lb rating.



by:

I neeed to pull a trailer with my 2019 GMC Yukon. I found Etrailer.com and followed the instructions on determining the drop of the hitch, the instructions were spot on. I hooked up my trailer to my Yukon today, all was level and worked perfectly.

I had driven around to Napa, Lowe’s, Home Depot and Walmart, and nobody had the 9” drop hitch I needed. Came back to Etrailer, bought the 2” ball and pin, and the Curt 9” drop hitch. I received the items quickly.

Great website,

Thanks,

Craig



by:

Quality is fine. The experience is the reason for the 3 star rating. This ball does not fit the ball mount you sent, and I didn't figure it out until it was too late to return. As always, helpful, friendly staff, but this order had a couple of things the didn't match up. For example, the ball mount did not come with a pin to hold it into the receiver. As a novice, it would have been helpful to have your staff identify this.



by:

A friend who has towed 9000lbs+ boats, recommended you, and thankfully, I took his advice. The person who answered my call last year was very knowledgeable and gave ne excellent advice for my towing problem(front end sway) and advised me to purchase a proper sway and load hitch, which I did and installed(even made a roll-around" to store the heavy items when not in use).
Thank you for excellent service, bruce



by:

We have been using these 10,000 lb. 2-inch balls on 7 trucks that tow about 30,000 miles each per year. We replace them every 2 years for safety and have never had any problems with them. I will continue to use this product.



by:

Great advice when I called for technical question about trailer balls -- answered by a live human who knew what they were talking about. This Hitchball has served us well over 9,000 miles of towing our Casita.


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Show More Reviews

See what our Experts say about this CURT Trailer Hitch Ball

  • Torque Spec to Install Curt Hitch Ball # C40088
    The torque spec you found on Curt's site is a typo. It should be 455 ft lbs of torque to tighten the nut of the hitch ball # C40088 and not 4,550 ft lbs.
    view full answer...
  • Correct Torque Spec For The Curt 30K Hitch Ball C40088
    There is definitely a typo in Curts instructions. I noticed that their website also says 4550 lbs. So this must have been entered incorrectly by someone at some point. The correct torque spec for the nut on the # C40088 is 450 ft lbs. I confirmed this with my contact at Curt. Torquing something like this to 4550 ft lbs would not be physically possible. That would be way beyond anything any human could achieve. So unless those instructions were written by the Greek god Hercules, it is certainly...
    view full answer...
  • Availability of 2-5/16 inch Hitch Ball with 2 Inch Diameter Shank
    We do have a few 2-5/16 inch hitch balls with a 2 inch diameter shank available, such as the Curt # C40088, however these do not feature any kind of rise. The Curt hitch ball has shank with a 3-1/2 inch length. This hitch ball will provide a weight capacity of 30,000 pounds. I have attached a short demonstration video on this product for you to check out.
    view full answer...
  • Trailer Hitch Ball That Is 2-5/16" With A 2" Shank
    Yes we do offer a 2-5/16" ball with a 2" shank. I recommend the 2-5/16" Hitch Ball - 2" Diameter x 3-1/2" Long Shank - Machined - 30,000 lbs Item # C40088.
    view full answer...
  • Installation of a Curt Trailer Hitch Ball with a Round Shank, # C40088
    What you can do is place the ball in the ball mount and thread the lock nut and nut on the shank hand tight. Then place the ball upside down in a bench vise, gripping the somewhere below the ball so you do not scrap up the ball. Then you can use a wrench to tighten the nut to the specifications indicated on the tag for the ball.
    view full answer...
  • Available 2-5/16-Inch Hitch Balls with 2-Inch Diameter Shank
    We do have two 2-5/16-inch hitch balls that have a 2-inch diameter shank that is also 3-1/2-inches long; both appear on the linked page. B&W part # BWHB94009 that you referenced is one and the other is Curt item # C40088. Please note that both of these use a coarse thread, either 4-1/2 or 5 threads per inch; both also include a matching lock washer and nut. All balls in the 2-5/16-inch size appear on the linked page and some of these have fine threads but the two above are the only ones...
    view full answer...
  • Gooseneck Hitch Ball With 2 Inch Diameter Shank
    For your 2 inch diameter shank we only have the coarse thread option for the 2-5/16 inch hitch ball. If you can make that work, we have the 2-5/16" Hitch Ball - 2" Diameter x 3-1/2" Long Shank - Raw - 30,000 lbs # BWHB94009 and the similar Curt # C40088.
    view full answer...
  • Curt # 40088 Hitch Ball Threads Per Inch
    I reached out to my contact at Curt and he confirmed the threads on the Curt hitch ball # C40088 is standard coarse threading of 4.5 threads per inch just like the B&W hitch ball # BWHB94009 you referenced.
    view full answer...
  • Tips for Getting a Nut Loose From a Ball on a Ball Mount
    Tightening a ball to a ball mount does require a substantial amount of foot pounds of torque. The lock washer puts further tension on it. What you can do is put the ball mount in the shank side ways and use a special wrench for the large nut to get enough leverage to break the nut free. If it was cross threaded, you will not want to re-use the ball due to thread damage. Some penetrating oil might also help. Let it soak in for 15 minutes. Curt makes a wrench, # C20001, if the ball you have...
    view full answer...
  • What 4-1/2 Thread Per Inch Coarse Thread Hitch Balls Are Available?
    The 2-5/16" Hitch Ball # C40088 and # BWHB94009 are the only hitch balls we carry with the 4-1/2" thread per inch coarse thread. These will not have the riser ball like you are looking for. These balls have a 2" diameter shank. For a riser ball you would have to look at the 2-5/16" Hitch Ball w/ 1" Rise # BWHB94005 or 2-5/16" Hitch Ball w/ 2" Rise # BWHB94006. These have fine threads 12 per inch and only a 1-1/2" diameter shank.
    view full answer...

Do you have a question about this Trailer Hitch Ball?


Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Laura H
Written by:
Laura H
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Amanda M
Updated by:
Amanda M
Employee Brian T
Updated by:
Brian T
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B

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