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  1. Trailer Hitch Ball
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  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 2-3/4" Long Shank - Chrome - 20,000 lbs

2-5/16" Hitch Ball - 1-1/4" Diameter x 2-3/4" Long Shank - Chrome - 20,000 lbs

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Trailer Hitch Ball
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Durable steel ball has a 1-1/4" diameter x 2-3/4" long shank. Chrome finish resists corrosion. Fine threads provide strong grip. Lock washer and nut included. Lowest Prices for the best trailer hitch ball from CURT. 2-5/16" Hitch Ball - 1-1/4" Diameter x 2-3/4" Long Shank - Chrome - 20,000 lbs part number C40008 can be ordered online at or call 1-636-306-4830 for expert service.
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  • Reviews (3003)
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  • Videos (2)
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CURT Trailer Hitch Ball

  • Trailer Hitch Ball
  • 2-5/16 Inch Diameter Ball
  • 1-1/4 Inch Diameter Shank
  • Standard Ball
  • 20000 lbs GTW
  • Class IV
  • Class V
  • Chrome-Plated Steel
  • 2-3/4 Inch Shank Length
  • CURT

Durable steel ball has a 1-1/4" diameter x 2-3/4" long shank. Chrome finish resists corrosion. Fine threads provide strong grip. Lock washer and nut included.


  • Hitch ball provides a connection point for your trailer's coupler
  • Fine threads provide exceptionally tight, strong grip
  • Heat-treated steel is durable
  • Corrosion-resistant chrome finish
  • Lock washer and nut included


  • Ball diameter: 2-5/16"
  • Shank dimensions: 1-1/4" diameter x 2-3/4" long
  • Weight capacity: 20,000 lbs
  • Fits ball mount platforms at least 3/8" thick
  • 1-Year limited warranty

40008 Curt 2-5/16" Hitch Ball with Medium Shank - 20,000 lbs GTW - Chrome

Item # C40008

Video of 2-5/16" Hitch Ball - 1-1/4" Diameter x 2-3/4" Long Shank - Chrome - 20,000 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 - C40008 Review

Today we're going to be reviewing part #C40008. This is the 2-5/16 inch hitch ball from Curt. It's going to feature fine threads that are going to provide exceptionally tight and strong grip. This is made from a steel construction with a nice chrome finish so it's going to stand up really well against rust and corrosion. You're going to get the 2-5/16 inch hitch ball as well as the lock washer and the nut so everything that you see here is included. This unit, once installed, needs to be completely tightened down to 450 lbs. of torque. A few measurements to go over with you real quick.

The ball diameter again is going to be 2-5/16 of an inch. If we take a measurement of the shank, which is this portion right here, that's going to give us a length of 2-3/4 of an inch from the bottom of the ball platform to the very end of the shank. Now just the threaded portion looks like it's going to measure about 2-1/4 of an inch. The shank diameter is going to give us a measurement of 1-1/4 inches. Now in choosing the hitch ball, the ball shank diameter should be within 1/16 of an inch of the hitch ball hole diameter on your mount. Again, this is going to offer a hitch ball size of 2-5/16 of an inch and it's going to have the capacity of 20,000 lbs.

All that information is labeled right here on top of the hitch ball. Once you have this through the mount, the lock washer goes on the underside followed by the nut. You can go ahead and get it hand tied or you can tighten it with a wrench but you will need a torque wrench to get it to that 450 lbs. of torque that is required from the manufacturer. That's going to do it for our review of part #C40008. This is the 2-5/16 inch hitch ball from Curt. .

Customer Reviews

2-5/16" Hitch Ball - 1-1/4" Diameter x 2-3/4" Long Shank - Chrome - 20,000 lbs - C40008

Average Customer Rating:  4.9 out of 5 stars   (3003 Customer Reviews)

Durable steel ball has a 1-1/4" diameter x 2-3/4" long shank. Chrome finish resists corrosion. Fine threads provide strong grip. Lock washer and nut included.


Did exactly what is advertised to do. Well build. All the components have nice finish.


This ball mount has served it purpose well. I purchased a new travel trailer that is heavy enough to require a weight distribution hitch when using the factory installed Class III hitch on our Dodge RAM 2500. I decided to upgrade to a Class V hitch combined with this ball mount to take delivery of the TT in order to defer decisions about a WD hitch until the actual load conditions were known. The hour trip home with this setup worked very well. Once the trailer was outfitted I was able to determine the actual tongue weight of the loaded trailer and I decided to purchase an appropriately sized Reese Straight Line WD hitch. However, this ball mount comes in handy for moving the trailer short distances without hassling with the WD system. The purchase experience through was first rate.


Nicely plated and fits well. Without flat spots on the base to hold, I was afraid the ball would slip and turn while I tightened the nut, but I had no problem installing it on the Curt ballmount. It has great capacity, and I have no worries about it safely pulling my boat.

Works well. Has stayed tight and does the job to haul a 4 ton boat and trailer
Larry P - 03/02/2018


This ball works perfectly with my hitch


No one had a 2 5/16 inch ball in 14000 tow weight. As we had to move our trailer and as I called numerous dealers and was told not available, I reached out to etrailer. They also didn't have it but suggested I go larger in the ball so long as it fit the tow hitch and the shank. It did I'm still using it and am very happy with the product and the quick service and turn around with my order.


Great product, gives me total confidence in my ability to pull my car trailer. etrailer is a great company to deal with.

So far I have pulled my trailer over 10k miles with my ‘16 Ram 2500. The hitch is easy to use and really helped with sway even when empty. Best choice I could have made for my trailer.
Aaron C - 07/07/2018


I was really pleased the order got here a couple of days before it was supposed to. I have bought a lot of items from etrailer superior service. It's nice to know when I order something it fits without issues.


product installed

simple design
and easy use makes this a winner in my books.


Function as advertised


I ordered a Class V ball and ball mount with pins. This is for the 2.5 inch heavy duty receiver. I needed a set-up for pulling an emergency services boat that weighs over 18,000 lbs.

I was able to get a set-up rated at 20,000 lbs, in stock. Shipping was fast and quality looks good.


We always call etrailer, first, whenever we need anything for our Motor home or our trailer. They are so knowledgeable and supportive, it takes all the worry out of ordering wrong. They even helped us with ordering Thule carrier and cross bars!

Thank You!!!!


Good, solid product. We tow our 15,000 lb boat behind our Ford F-250 using it. You do need a pretty long torque wrench to tighten the nut to specs, and because there are no flats on the ball end, you have little choice but to damage the chrome plating in the throat a big with a pipe wrench as you tighten. But no big deal.


Great Ball, works perfectly. The nut is BIG so make sure you have a big enough socket to tighten this monkey up! Put it on the hitch, then put the hitch in your receiver sideways so you can get better leverage to tighten the nut.


I received everything that I requested in a short time even with the free shipping. The ball mount and the balls I requested and the 2-5/16th ball and the 2" ball were just what I needed. the ball cap for the 2-5/16 ball fit perfect the ball cap for the 2" was really just made for the smaller ball. I would recommend that they make a ball cap for just the 2" ball. Got it to fit but not that well. I will need breaks for my boat trailer after this season and I plan on using etrailer for those parts. will need to call them before I make purchase as Im not sure how to size them up.


Carol, when I have a chance to install the hitch I will. I am waiting on delivery if my hitch. Can I ask you to confirm the nut size on the Curt 2 5/16 the ball. I think it is 1 7/8" but cannot find it anywhere on your site. I called and your support person thought 1 13/16, but was not sure. Tks!


We liked the results of how well the Reese weight distribution and sway control system so much that we went ahead and ordered the parts needed to set up a second vehicle to tow the same trailer. Reese and have made preparing for and towing the race car hauler a breeze! We couldn't ask for a better combination...


Just as described. Its a Chrome 2-5/16 ball that works well with the Curt C45340 hitch.


This hitch ball looks good - the chrome finish looks too good to hook a trailer up to and it meets the weight ratings I was looking for, which is clearly stamped on the top of the ball. Now I just have to torque it up to the 450 ft lb spec required as stated on the attached tag and I will be good to go.


For the price I could pass it up.working well towing a 16k dump trailer.

Better than expected
William B - 02/25/2018


the ball mount and ball are well made and were shipped in a timely matter.very satisfied with products and shipping, Thank you Ron


Nice chrome trailer ball. Installed easily on the new hitch.


This hitch ball is stout!! It’s heavy and dense and made very well. This is the second one I have purchased, as this one will be installed on a lower drop Curt hitch.


Works well with the receiver hitch I mounted it to. Gets used almost every day.


Great folks to deal with, good products at good prices. Free shipping was a sell point because of how heavy the order was. ( Ordered the cast steel hitch with this ball as well)


perfect fit worked better than I expected great for the price HEAVY DUTY Beautiful Chrome

Show More Reviews

See what our Experts say about this CURT Trailer Hitch Ball

  • Socket or Wrench Size Needed for Curt Ball Mount C40008
    The wrench size needed to install the Curt hitch ball part # C40008 that you referenced would be 1-13/16 inches. The torque required for tightening the nut is 450 ft lbs...
    view full answer...
  • Which 2-5/16 Hitch Ball Is Better Of The Curt 40008 and 40009?
    We only carry the Curt 2-5/16" Hitch Ball # C40008 as it is the better choice with the hot-forged steel. This will work great for your 30' camper as it is rated for 20,000lbs. The Curt 40009 uses high carbon steel that gets heat treated to make it harder. If this process is not done exactly you risk strength issues. Both balls are chrome plated for corrosion protection.
    view full answer...
  • Recommended Socket Size For Curt Ball Mount C40008
    The socket size needed to install the Curt hitch ball # C40008 would be 1-13/16 inches. The torque required for tightening the nut is 450 ft lbs. If you do not have a torque wrench rated up to 450 foot pounds in which case you'll never really measure it at 450. When tightening the ball you want to make sure you get the lock washer, so that it's completely flat. One way to make it easier on you is to put the ball mount in your hitch receiver sideways so the hole is vertical. Then install...
    view full answer...
  • How Do You Tighten a Hitch Ball that Doesn't have Wrench Flats
    If you have a bench vise you can put a cloth around the ball and use the vise to hold it so you can torque the nut to spec on ball # C40008. Like you said this ball doesn't have wrench flats so there isn't really a better way than using a vise. If you do not already have a ball you could use # 63840 instead which does have wrench flats.
    view full answer...
  • Can Ball of Curt Pintle Hook 2-5/16 Ball for 2-1/2 Hitches - 20,000 lbs Part #C48012 be Removed
    The ball of the # C48012 can be removed. The replacement ball for this ball mount/pintle is the part # C40008 which has a 1-1/4 inch shank diameter. The tongue weight capacity of this 2,000 lbs.
    view full answer...
  • How to Torque Hitch Ball When Installing into Ball Mount
    We don't have a combo of the Curt Hitch Ball # C40008 and Curt Ball Mount # C45340. The ball mount is extremely heavy-duty, rated up to 17,000 pounds. I think it's safe to assume you don't have a torque wrench rated up to 450 foot pounds just laying around. In which case you'll never really measure it at 450. When tightening the ball you want to make sure you get the lock washer so that it's completely flat. One way to help you do this is to put the ball mount in your hitch receiver...
    view full answer...
  • Which Ball Mount to Provide Exactly a 3-1/2 Inch Drop
    When you do the calculations to determine the rise or drop of ball mount you need, you don't need the ball mount to be absolutely exact to the rise/drop you're needing. As long as you're within an inch to an inch and a half of level, plus or minus you'll be fine. If you're wanting a 3-1/2 inch drop, going with the Draw-Tite # 40331 with a 4 inch drop would put you within 1/2 inch of level, which is certainly close enough. For a 2-5/16 inch ball, you can use # 19286 if a 12K capacity will...
    view full answer...
  • Weight Distribution for an RV on Ford F-550 Chassis Towing 9,000 Pound Car Trailer
    The Ford F-550 chassis is up in the medium duty range but with the weight of the RV body on it and the tongue weight of the trailer at 1,000 pounds, you would likely still benefit from weight distribution. A good rule to go by is if the loaded trailer gross weight is at least 50 percent of the vehicle weight, or if the vehicle sags at the back when connected to a trailer, weight distribution is a good idea. To choose a weight distribution system you will need to go by the total tongue...
    view full answer...
  • Can the Ball Mount # C45340 be Ordered with the Curt Hitch Ball # C40008 Already Installed
    I do have a solution for you, but we do not install parts like the Curt Heavy Duty Forged Ball Mount # C45340 and 2-5/16" Hitch Ball # C40008 before shipping them out. Any ball mounts that come with a hitch ball installed come like that directly from the manufacturer. If you do not need the full 17,000 lb capacity of the ball mount # C45340 that you referenced then you can use the Curt Heavy Duty Forged Ball Mount # C45331 which is essentially the same exact ball mount with a 2-5/16" hitch...
    view full answer...
  • Solution for Needing Curt Ball Mount and Hitch Ball in 1 inch Drop Position Over 1 inch Rise
    Since we do not have a version of the # C45331 with the setup in the rise position instead of the drop position your best option would be to remove the ball and reinstall it in the rise position or go with the part # C45340 and # C40008 which you could then attach to the ball mount in the rise position. The demand for ball mounts in the drop position is much more than in the rise position as tow vehicles generally are getting taller and taller while trailers mainly are staying same height....
    view full answer...
  • How Long Should Hitch Ball Shank Be to Fit Curt Forged Ball Mount # C45458
    The 2-1/2 inch shank length on B&W ball # BWHB94004 might be just a bit too short for ball mount # C45458. The recommended ball, # C40008, has a shank length of 2-3/4 inches. Basically the shank has to be long enough for the nut to thread all the way on with about 3 or more threads sticking out past the bottom of the nut.
    view full answer...
  • Recommended Weight Distribution System for a 2020 Gulf Stream Kingsport 248BH
    The weight distribution system I recommend for a 2020 Gulf Stream Kingsport 248BH is the Curt TruTrack Weight Distribution System part # C17499 which will have you covered while empty or fully loaded. This system is a great option with integrated sway control so not only do you get the reduced sag/squat you also get better control of the trailer on the highway. The best part of all is that it's all bolt-on and pretty easy to setup. In order to complete your setup you'll also need part #...
    view full answer...
  • Recommended Weight Distribution for Toy Hauler Tongue Weight 1,400-1,500 lbs
    The Strait Line Weight Distribution System part # RP66075 will be the better choice for your tongue weight range of 1,400 to 1,500 lbs. This system has the best sway control design on the market which fights to prevent sway before it starts. It does require some frame drilling though which I can understand is something you'd rather not do, but once it's done you'd be good to go. The holes do not affect the integrity of the frame either as the bolts being tightened where the holes are drilled...
    view full answer...
  • Weight Distribution for Riverside Whitewater Retro 179 SE
    The Blue Ox Weight Distribution system part # BLU36FR is a great option for a weight distribution system for your 179SE based on the weights you mentioned. But to use a 2-5/16 inch hitch ball you'd have to swap out what comes with it and go with the part # C40008 which will fit in place and is the size you want. For this tongue weight range of weight distribution they are not available with the larger ball size as a kit.
    view full answer...
  • Recommended Ballmount for 2-1/2 inch Hitch Receiver, Hitch Ball and Sway Control Arm
    Our standard 2-1/2" ball mounts come in a 1 inch rise, like part # BWBMHD30210. I have included a FAQ about choosing the correct ballmount for you to check out. For a Hitch Ball with a 2-5/16" diameter you can use # C40008. This ball has a long shank and 20,000 lbs GTW. For a friction sway control system I recommend the Reese Friction Sway Control unit, part # 83660. This system can be used on the left or right side of the trailer.
    view full answer...
  • Hitch Ball Comptibility With Heavy Duty Ball Mount
    The B&W Heavy-Duty Ball Mount - 5" Rise, 6" Drop - 10-3/4" Long - 16,000 lbs # BWBMHD30014 will accept a 2-5/16 inch hitch ball that has a 1-1/4 inch diameter shank. If you hitch ball has this, it will work fine. If not, then I recommend the Curt # C40008. You may want to consider using a locking hitch pin like # e98880 to protect your investment.
    view full answer...
  • Recommended Curt Weight Distribution System for a 2015 Keystone Hideout 260LHS
    The Curt Weight Distribution System I recommend for a 2015 Keystone Hideout 260LHS is the Curt TruTrack Weight Distribution System part # C17499. The TruTrack has integrated sway control which will do a much better job than systems with add-on sway control such as the Curt Weight Distribution System part # C17341 with the Curt Friction Sway Control part # 17200. Furthermore this option does not require drilling into the trailer frame, it offers easiest setup, and does not restrict the reverse...
    view full answer...
  • Ball Mount with 4 Inch Rise for a 2014 Ram 3500 with 2-1/2 Inch Receiver and 16,500 Pound Boat
    the best ball mount option for the 2-1/2 inch receiver on your 2014 Ram 3500 and the 16,500 pound boat plus the trailer is going to be # AMSCV-6. This is a cushioned ball mount rated for 18,000 pounds. It offers 4-3/4 inches of rise. I have included a link to a video review of this ball mount for you. This ball mount has a ball hole diameter of 1-1/4 inches. If you need a 2-5/16 inch ball I recommend # C40008 which is rated for 20,000 pounds.
    view full answer...
  • Recommended Trailer Hitch Receiver for 1979 Ford F-250
    I recommend the Draw-Tite Class III Trailer Hitch Recevier # 37133 for your 1979 Ford F-250. This hitch will fit either the standard bumper or the deep drop bumper. It will however, not fit if you have lower rear fascia or a rollpan or tube bumper. It is a bolt on installation but does require some drilling. For trailer wiring you can use the Tekonsha Wiring Harness # 18252. This will add a 4-pole onto the back of your truck and includes quick-splice connectors to make it easier to...
    view full answer...
  • What Weight Range Weight Distribution for Trailer with 1,400 lbs Tongue Weight
    If you have a tongue weight of 1,400 lbs a weight distribution with a higher tongue weight range would be ideal. Especially when you consider that the weight of any cargo behind the rear axle of the tow vehicle gets added as additional tongue weight. So a higher rated system like the Equal-i-zer part # EQ64FR would be your best option as it has a tongue weight range of 1,200-1,600 lbs. You'll also need a thin-walled socket to install the ball # C40008 too with the # ALL643216.
    view full answer...
  • Width Dimensions for Mounting the Reese Super Titan 4000 Trailer Hitch on a 2000 Dodge Ram 3500
    The Super Titan 4000 Trailer Hitch # 38208 is actually designed to fit a C-channel frame. To determine if it will fit your 2000 Dodge Ram 3500 you just need to make sure that your frame is about 34" - 34-1/2" wide and is at least 8-3/4" tall. I spoke with my contact at Reese who said that the outside dimensions with the spacers is 34-1/2" but when you remove the spacers you get the 34" width. If you are needing bigger spacers I highly recommend not fabricating some as then the weight capacity...
    view full answer...
  • Recommended Weight Distribution for Trailer With 1600 lbs of Tongue Weight
    Whew. That's one heavy trailer! As long as the trailer tongue weight won't exceed 1600 lbs, the # EQ64FR Equal-i-zer Weight Distribution System would be ideal. This particular system is meant to be used in a Class V hitch with a 2-1/2 inch by 2-1/2 inch receiver. This is the highest rated system Equal-i-zer offers. If your trailer's tongue weight will exceed 1600 lbs, the next step up is the Reese # RP66075 Strait-Line, good for up to 1700 lbs of tongue weight. The sway control component...
    view full answer...
  • Recommended Distribution Hitch For 1480 lb Dry Trailer Tongue Weight
    I do understand your situation and I am here to help. What the dealer was trying to say is that trailer Tongue Weight (TW) is typically, about 10 to 15 percent of the Gross Trailer Weight (GTW), and a system should be picked with those figures in mind. Total Tongue Weight (TTW) also refers to the tongue weight of your trailer plus the weight of the cargo that sits behind the rear axle of your vehicle. The recommendation of a weight distribution hitch rated at 1,200 pounds tongue weight...
    view full answer...
  • Weight Distribution and Sway Control Recommendation 2018 Jayco Eagle 322RLOK
    The best weight distribution/sway control systems are the Equal-i-zers like the part # EQ64FR you mentioned but the trick is picking out a kit that the trailer's loaded tongue weight falls right into the middle of. This system has a tongue weight range of 1,200 - 1,600 lbs. I looked up your 2018 Jayco Eagle 322RLOK and based on the dry weight, dry tongue weight, and GVWR this would be a great option rated perfectly. For a hitch ball you'd then want the part # C40008 and the socket part...
    view full answer...

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Info for this part was:

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Expert Research:
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Employee Dustin K
Video Edited:
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