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  1. Trailer Hitch Ball
  2. CURT
  3. Trailer Hitch Ball
  4. 2-5/16 Inch Diameter Ball
  5. 1 Inch Diameter Shank
  6. Standard Ball
2-5/16" Hitch Ball - 1" Diameter x 2-1/8" Long Shank - Chrome - 7,500 lbs

2-5/16" Hitch Ball - 1" Diameter x 2-1/8" Long Shank - Chrome - 7,500 lbs

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Trailer Hitch Ball
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Durable chrome ball has a 1" diameter x 2-1/8" long shank with fine threads for a superior grip. The nickel chrome finish provides corrosion-resistance. Lowest Prices for the best trailer hitch ball from CURT. 2-5/16" Hitch Ball - 1" Diameter x 2-1/8" Long Shank - Chrome - 7,500 lbs part number C40005 can be ordered online at or call 1-800-496-5010 for expert service.
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CURT Trailer Hitch Ball

  • Trailer Hitch Ball
  • 2-5/16 Inch Diameter Ball
  • 1 Inch Diameter Shank
  • Standard Ball
  • 7500 lbs GTW
  • Class III
  • Chrome-Plated Steel
  • 2-1/8 Inch Shank Length
  • CURT

Durable chrome ball has a 1" diameter x 2-1/8" long shank with fine threads for a superior grip. The nickel chrome finish provides corrosion-resistance.


  • Hitch ball provides a connection point for your trailer's coupler
  • Durable, corrosion-resistant nickel chrome finish
  • Fine threads provide tight, strong grip
  • Wrench flats allow for easy installation


  • Ball diameter: 2-5/16"
  • Shank dimensions: 1" diameter x 2-1/8" long
  • Fits ball mount platforms that are at least 3/8" thick
  • Weight capacity: 7,500 lbs
  • 1-Year limited warranty

40005 Curt Trailer Hitch Ball for 2-5/16 Inch Couplers - Chrome

Item # C40005

Video of 2-5/16" Hitch Ball - 1" Diameter x 2-1/8" Long Shank - Chrome - 7,500 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 - C40005 Review

Today we're going to be taking a look at the Curt 2 5/16 inch hitch ball. This hitch ball provides a connection point for your trailer's coupler. It's a steel construction with a durable, corrosion-resistant nickel chrome finish. It's going to feature fine threads that provide tight, strong grip and it's going to have the wrench flats on it. Right here it's got the flat sides on the flat form. That allows for an easier installation.

It's also going to come with your split lock washer and the mounting nut. In the manufacture specifications those are going to be on a tag that comes on the ball. That's where you're going to find the torque rating for this particular hitch ball. Again the diameter is 2 5/16 of an inch. It's going to have a weight capacity of 7,500 lbs. shank diameter is going to measure 1 inch.

Shank length is 2 1/8 of an inch and this is designed to fit on a ball mount that has a draw bar or a platform thickness of at least 3/8 of an inch. You place this through the ball hole. On the underside you'd put the split lock washer and then you would place on the nut. Get that all the way tightened down and torqued to the specifications listed by the manufacturer. That's going to do it for today's look at the Curt 2 5/16 inch hitch ball.

Customer Reviews

2-5/16" Hitch Ball - 1" Diameter x 2-1/8" Long Shank - Chrome - 7,500 lbs - C40005

Average Customer Rating:  4.9 out of 5 stars   (2859 Customer Reviews)

Durable chrome ball has a 1" diameter x 2-1/8" long shank with fine threads for a superior grip. The nickel chrome finish provides corrosion-resistance.


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.


It's a ball, got it in a timely fashion. No problems


This is a 2-5/16” trailer ball. It’s the smaller shank diameter. All installed with no issues.


Fastest way to get your hitch connector is with etrailer.


Fit the hitch and trailer perfectly. Tightening down to the proper spec was a little difficult with hand tools, but managed to make it work.


Trailer ball came exactly as described fast shipping was kept very informed of order status


The ball is mated perfectly (rating 7500 lbs) to the rest of my hitch system - Meriah found it for me looking thru her in stock products


Item was delivered as promised. Item was in excellent condition and installation was easy. Customer service was excellent, as usual.


Excellent service and fast shipping.
called for some technicle advice and was helped quickly.


Fast friendly service! Second time I have used them and once again got my part within a week of ordering!


Works great as expected.





About a simple as it gets, installed in seconds with our 3/4" iimpact gun.


Product was in perfect shape and delivered on time. All great.


Purchased for a prototype part. It exceeds my expectations and got here fast!


Bigger shiny.




It performed as expected


amazing fast shipping, thank you



Item shipped fast. Seems solid and well made.



Great product. Great price


Show More Reviews

See what our Experts say about this CURT Trailer Hitch Ball

  • Can 2” Hitch Ball With 1" Diameter Shank Be Replaced With 2-5/16" Hitch Ball
    As long as you use the same diameter shank you can definitely replace your 2" ball. I recommend the 2-5/16" Hitch Ball - 1" Diameter x 2-1/8" Long Shank - Chrome - 7,500 lbs # C40005. Since this has the same 1" diameter shank you will not have an issue using it with your existing ball mount. This ball has a 7,500 lb capacity and comes with a 1 year warranty.
    view full answer...
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  • What Size Wrench is Needed to Install Hitch Ball # 63840
    When installing the hitch ball part # 63840 you need to use a 2 inch wrench on the wrench flats of the ball and a 1-7/8 inch wrench for the nut on the shank.
    view full answer...
  • Shorter Tow Ball for Travel Trailer
    I recommend the Curt 2-5/16" hitch ball item # C40005. It has a 1" diameter x 2-1/8" long shank, with 0" of shank rise, and is rated at 7,500 lbs.
    view full answer...
  • Available 2-5/16-Inch Hitch Balls
    We offer many 2-5/16-inch hitch balls that you can see by clicking on the included link. First, you will want to select the required shank diameter to match the hole size on your ball mount. The 2-5/16-inch hitch balls we carry come in the following shank diameters: 1-inch 1-1/4-inch 1-3/8-inch 1-1/2-inch 2-inch You also need to select a ball with the appropriate length of shank so that it will fit your ball mount and allow enough room to install the lock washer and nut. Our hitch balls...
    view full answer...
  • Recommended Ball Mount To Replace Curt C45901 With Missing Parts
    I reached out to my contact at Curt and while I have a complete replacement option for you, the ball mount section of the # C45901 is not available separately. Since there is no other ball mount option of the same style that will fit your shank, you will need to purchase another # C45901. In addition you will need a hitch ball with a 1" shank, the 1-7/8" # C40002, 2" # 40083, or 2-5/16" # C40005. I included a video of the # C45901 for you to take a look at.
    view full answer...
  • Shank With 5 Inch Drop Compatible With Reese Steadi-Flex RP66558
    There are shanks with the drop you need that is compatible with the Reese Steadi-Flex Weight Distribution System with Sway Control # RP66558. Weight distribution shanks are interchangeable so what you can use is the Curt Weight Distribution Shank # C17121. This shank has a maximum of 5 inches of drop with a trunnion bar system like the Steadi-Flex so it's exactly what you need. Additionally, the Steadi-Flex is compatible with your 2 x 6 frame and top-mounted coupler, so the only other...
    view full answer...
  • When Should You Use A Weight Distribution Hitch
    Even if you are within the towing limits set by your equipment, vehicle manufacturer, etc., there are other indicators that you may benefit from a weight distribution hitch, including: Your trailer weight (GTW) is more than 50% of your vehicle's weight (GVWR) The rear of your tow vehicle sags when the trailer is hooked up You experience trailer sway Your tow vehicle's headlights point upward You find it difficult to steer or stop your rig You want to tow to the highest capacity allowed...
    view full answer...
  • Parts Needed To Add Sway Control To Camping Trailer For Single Highway Trip
    As you have the air bags on your 2014 Ford F-150 to level your truck when towing the camping trailer you will only need to add a sway control. As you mentioned you are only towing the trailer once the best option is to use a Curt Friction Sway Control # 17200. This will require you to use a Curt Ball Mount w/ Sway Control Tab # D320, and either a 2" Hitch Ball # A-90 or 2-5/16" Hitch Ball # C40005 to match the trailer coupler. The sway bar must be removed before backing up or doing any...
    view full answer...
  • Which Hitch Balls Work with the Draw-Tite Ball Mount Part # 2923
    Any trailer hitch ball that has a 1" diameter and at least 2-1/8" long shank will work with the Draw-Tite Ball Mount part # 2923. For a 1-7/8" hitch ball I recommend part # C40002, part # C40004 for 2", or part # C40005 for 2-5/16". I have also attached a selection of our hitch balls that will work with the above ball mount for you. To protect your ball mount/hitch ball, I recommend using the Trailer Hitch Receiver Lock part # e98880.
    view full answer...
  • Recommended 6 Inch Drop Ball Mount with Extended Length for a 2 Inch Trailer Hitch Receiver
    I recommend using the Curt Ball Mount part # D-28 which has a 6" drop. We do not have a 2" ball mount that offers exactly 6-1/2" of drop with an extended shank but since the vehicle will squat a bit while attached to the trailer, the 1/2" difference will not be an issue for you. This ball mount slides into a 2" receiver tube opening and works with hitch balls that have a 1" diameter shank. If you need a hitch ball I recommend using part # C40002 for 1-7/8", part # C40004 for 2", or part...
    view full answer...
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  • What is Included with the Curt Trailer Hitch Receiver Part # 13390
    The Curt Trailer Hitch Receiver part # 13390 comes with everything you will need for installation except the tools including 4 carriage bolts, 4 hole spacers, 4 hex nuts, and 2 firewire bolt leaders. In order to install this hitch you will need a 10/19 mm socket, 8" extension, ratchet, torque wrench, 17/32" drill bit, rotary tool, and file. If you will be doing any towing with the hitch then you will also need a wiring harness, ball mount, and hitch ball. For a wiring harness I recommend...
    view full answer...
  • Can the Buyers Products Trailer Hitch Ball for Pintle Mounts be Used w/ a Standard Coupler?
    Yes, the Buyers Products Trailer Hitch Ball item # 337RB2516 can be used with a standard ball couple when it is mounted with a Pintle Hook like the item # 337RM62516. Just to add the Pintle hitch ball you were referencing the Buyers Products Replacement Ball item # 337RB2516 has a ball size that matches the standard type of hitch ball but the size of the shank is larger on a pintle. Standard balls typically use a shank with a diameter of 1" - 1-1/4" while a pintle ball shank is 1-1/8 inches...
    view full answer...
  • Differences Between The Curt C13171 and Curt C13395 For A 2020 Jeep Cherokee
    The Curt Trailer Hitch Receiver # C13171 and the Curt Trailer Hitch Receiver # C13395 have a few big differences. The main one is that the # C13171 is only confirmed to fit Jeep Cherokee model years 2014 - 2019 so you wouldn't be able to use it on your 2020 Jeep Cherokee. Another main difference is the # C13171 has a maximum gross trailer weight capacity of 5,000lbs (maximum GTW when used with weight distribution of 6,000lbs) and a maximum tongue weight capacity of 750lbs (maximum TW...
    view full answer...
  • Best Stealth Trailer Hitch Receiver For a 2022 BMW X5 For Trailer Towing
    I recommend the Stealth Hitches Hidden Trailer Hitch Receiver w/ Towing Kit # SH25VR for your 2022 BMW X5. This kit contains a Stealth receiver that you can remove when you are not towing as to retain a stock appearance. Also included is the wiring for a 7-way trailer connection, 2" hitch receiver for hitch mounted accessories and a ball mount with 2" hitch ball. Depending on your trailer you will be towing you may need a 7 Pole to 4 Way Connector Adapter # PK12716 for the wiring. And...
    view full answer...
  • Sway Control For Hitch Not Rated For Use With Weight Distribution
    Good question, and the hitch on your Audi is not rated for use with weight distribution, so what I recommend instead is a friction sway control set up. This will provide you with better control over your trailer to give you a much more controlled, steady, and comfortable towing experience. The way it works is the ball plate from the kit attaches to your trailer frame, and the other end attaches to a tab on a ball mount, like in the accompanying photo. Just keep in mind this will only...
    view full answer...
    Image 1 for
  • Recommended Weight Distribution System for a 3000 lbs Boat Trailer with 200 lbs. Tongue Weight
    If you have an aluminum boat trailer frame, I suggest checking with the manufacturer to verify that a weight distribution system is a compatible solution. If so, then you would begin with installing a Equal-i-zer Pole-Tongue Adapter # EQ95-01-5950, since your boat trailer has a straight tongue. For your weight distribution system, I recommend the Fastway e2 Weight Distribution w/ 2-Point Sway Control # FA92-00-0450. This is a quality and cost effective system that has no-drill, clamp-on...
    view full answer...
  • Best Trailer Hitch Receiver and Wiring Kit For a 2022 BMW X3 M40i
    I recommend the Stealth Hitches Hidden Trailer Hitch Receiver w/ Towing Kit # SH62VR as being the best receiver for your 2022 BMW X3 M40i. When not needed the ball mount or receiver tube can be removed so you will not see a receiver on your BMW. The wiring is also included for a 7-way trailer connection and a 7-way to 4-way adapter is included that fits smaller trailers. The included ball mount comes with a 2" ball. You can change it out with a 1-7/8" Ball # C40002 or 2-5/16" Ball # C40005...
    view full answer...
  • Hitch Adapter For Carrying Bike Rack & Towing Trailer
    We do have an option for you to carry your bike rack while towing your trailer, though the part number you mentioned is not designed or rated for use with trailer towing, just flat towing (trailer towing has higher tongue weights than flat towing). So what you can use instead is a dual ball mount/hitch adapter: - Curt Multipurpose Ball Mount with 2" Receiver # D210 The # D210 has capacities of 7,500 lbs towing/750 lbs tongue weight so it's more than enough for towing your trailer and...
    view full answer...
  • Complete Towing Set Up For 2016 Jeep Cherokee to Tow Trailer
    Congrats on your trailer purchase and we can definitely get your 2016 Jeep Cherokee set up for towing it. Since you need everything it's going to seem like a lot of parts, but I promise it isn't as complicated as it may seem initially. First, let me go ahead and start with the basics for your '16 Cherokee, the hitch and wiring harness: - Draw-Tite Max-Frame Trailer Hitch Receiver # 75998 - T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118605 - Universal Installation...
    view full answer...
  • Ball Mounts For Equal-i-zer Extended Weight Distribution 4" Drop Shank
    The Equal-i-zer Weight Dist Shank # EQ90-02-4600 is designed to work with a weight distribution hitch head like # EQ90-02-1000. If this is what you are needing I would need to know what weight rating you need for your system. If you are wanting to use it as an adjustable ball mount the Ball Mount Adapter # BA-1 does share the same 3/4" bolt holes spaced 1-1/4" apart. It will require a hitch ball that has a 1" shank. 1-7/8" Ball # 19260 2" Ball # 40038 2-5/16" Hitch Ball # C40005 Another...
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Cole B
Installed by:
Cole B
Employee Chelsea B
Written by:
Chelsea B
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
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