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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
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Trailer Hitch Ball
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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. Lowest 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 1-636-306-4830 for expert service.
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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
  • 3-1/2 Inch Shank Length
  • CURT

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 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   (3002 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:

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.


Comments
Works great. Especially with my Anderson hitch. You couldnt tell there was 26,000 lbs. back there.
Albert W - 02/14/2017


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:

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.




by:

As advertised and great shipping. Excellent customer service.




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exactly what I needed




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by:

Review from a similar Curt Hitch Ball in Trailer Hitch Ball


The FastWay e2 hitch arrived missing ALL the assembly hardware so I cannot assemble or rate this product. I like etrailer.com a lot but your shipping company is a constant let down. Clearly the box for the e2 hitch has a big rip in it that was cheaply taped up with a bit of weak packaging tape. I don’t think you shipped it that way. Several other times I paid a lot extra for fast shipping but that failed every time. My most recent previous order was paid for 3-day shipping only to arrive 6 days after you sent it out. This happened at least three other times so I obviously won’t try that again. Love the products. Love the videos. The best way for you to improve our customer experience is to get a decent shipping company. UPS just can’t do the job.


Comments
Wow I am so sorry to hear that you are missing all the hardware! I will send your information to our customer service team and get you squared away! I will have them look into the shipping costs as well.
-- Etrailer Expert Brooke M - 07/26/2022


by:

Review from a similar Curt Hitch Ball in Trailer Hitch Ball


This item was one of many I needed to build a boat trailer for my 16 foot inflatable. COVID and supply chain issues made buying a market trailer impossible, so I decided to build one. I started with a suitable trailer with a fold down ramp, available locally. Then with the inspiration and instruction of many pictures on the etrailer site, I designed and assembled a custom built trailer with bunks, rollers, mounts, winch/stand, etc. with the parts sold here. The trailer worked fine for launching/retrieving the boat fully assembled. Thanks for your help!
Now all that's needed is more water in Lake Powell...




by:

Review from a similar Curt Hitch Ball in Trailer Hitch Ball


Still looks great. Only problem I had was finding someplace where I live that would tighten the nut to the recommended torque amount. It was way higher than any torque wrench I had


Comments
still doing great.
Steven - 08/15/2022


by:

Review from a similar Curt Hitch Ball in Trailer Hitch Ball


What to say about a hitch ball? It went on the mount easily and quickly. All parts and instructions were included, packaged well, and in perfect condition. Delivery was fast. Price was excellent and the customer services was even better! Thanks to Paula S. And etrailer for another great experience.




by:

Review from a similar Curt Hitch Ball in Trailer Hitch Ball


I upgraded to this ball as I also ordered a 14,000 # convert-a ball with a 1.25 inch hole to pull my new dump trailer. Is a very nice setup with the dampening feature.


Comments
Seems to be working as I expected
Monte E - 07/20/2022


by:

Review from a similar Curt Hitch Ball in Trailer Hitch Ball


The smaller items were just tossed in the larger box with the receiver. So the box has several holes in it and the wiring harness was laying on the ground next to it when delivered. Also, the locking pin was well overpriced.




by:

Review from a similar Curt Hitch Ball in Trailer Hitch Ball


There are a lot of underrated ball hitches out there, I highly suggest that everyone examine theirs and make sure you have one rated high enough to safely do the job. This 12,000 pound ball is plenty enough for everything from small utility trailers to large car haulers.




by:

Review from a similar Curt Hitch Ball in Trailer Hitch Ball


Looks like a good quality tow ball. I'll never be able to tell you though. I cut the shank off to build my own trailer coupler lock for cheaper than a purpose built coupler lock. This ball plus the e98883 coupler pin lock makes my trailers secure in my yard as well as anywhere we go. Trailer can't be towed away if there is already a hitch ball locked in the coupler and there a only enough shank left to grab the ball but not enough left to hook it to a new hitch reciever. And by buying enough keyed-alike coupler pin locks, one key fits all trailers unlike previous setups I tried where each coupler lock had its own key.




by:

Review from a similar Curt Hitch Ball in Trailer Hitch Ball


What can I say - it is a towing ball. I have a rather large landscape trailer and this is just the ball needed to pull it with some safety margin above the trailer's GVWR -- this is about the highest rated 2-in ball I have seen before jumping up to the 2 5/16" balls usually reserved for campers and other larger bumper pulls. The only negative I have seen on this is the torque rating, which is what it is.

450-ft-lbs -- you better have a [**] beefy torque wrench, be willing to buy one, or know someone who does. Given the cost of torque wrenches above 300 ft-lbs it would be a really nice option if etrailer would offer service where the ball can be delivered pre-torqued on the drop or raise shank of your choice.


Comments
I stand behind my initial review though point of clarification. I ordered the ball in 2019, posted a 1 year review in 2020. And now they are asking me for another 1 year update....well 2 years later it is still solid.
Jesse D - 09/14/2021


by:

Review from a similar Curt Hitch Ball in Trailer Hitch Ball


Looks like a good quality tow ball. I'll never be able to tell you though. I cut the shank off to build my own trailer coupler lock for cheaper than a purpose built coupler lock. This ball plus the e98883 coupler pin lock makes my trailers secure in my yard as well as anywhere we go. And by buying enough keyed-alike coupler pin locks, one key fits all trailers unlike previous setups I tried where each coupler lock had its own key.




by:

Review from a similar Curt Hitch Ball in Trailer Hitch Ball


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.



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3002
Show More Reviews

See what our Experts say about this CURT Trailer Hitch Ball

  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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?




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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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