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Durable steel ball has a 1" diameter x 2-1/4" long shank. Built-in wrench flats ease installation. Chrome finish resists corrosion. Fine threads provide strong grip. Lock washer and nut included.
Features:
Specs:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today were going to take a look at the Curt 2-inch hitch ball, part number 40038. This hitch ball is 2 inches in diameter. It has a shank diameter of 1 inch, and a shank length of 2 inches. The wrench flats, as you can see here and here, are 1 5/8 of an inch apart. This item has a weight capacity of 12,000 pounds. It features fine threads for more holding strength.
It meets US V5 specifications and it is tested for safety. Now were going to bring in our ball mount and our trailer hitch demonstrator to show you how this would be installed. You would just slide the shank into the ball hole, place the washer, the washer and the nut do come with this item, and then finger tighten that, and once youve got that as tight as you can get it by finger tightening, you would get your wrench and tighten it the remainder of the way so you can use it with your trailer coupler and attach your trailer. That should do it for our Curt 2-inch hitch ball, part number 40038.
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews

Heather A.
3/31/2025
Great feedback! Thanks Don!

Keith
4/15/2019
Youre a great company at etrailer.com George. Super website. The Curt branded products I bought from you are great after one year.

Larry
9/29/2024
This trailer ball is well made. It stillfunctions as it should over another 1000 miles

Victor W.
1/30/2021
Im satisfied with the fit and finish after many uses.

Kenneth
3/19/2020
Product has been working great with no issues. Have enjoyed etrailer with ease of shopping and great delivery.

Jenny N.
4/27/2022
We do recommend greasing the hitch ball to help disconnecting the coupler and to help protect rust. Use with the trailer coupler is going cause scratches which will eventually lead to rust. I recommend using grease part # 58117 with the ball.

Lee H.
9/11/2020
Continue to get reliable use of my Etrailer ball and hitch. Quality material.

Jeff
9/16/2025
Works great, no issues

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Frank P.
10/2/2023
Great. Used it a few times. Thanks