Menu Icon
Curt 4" Offset Ball for Double-Lock Gooseneck Hitch

Curt 4" Offset Ball for Double-Lock Gooseneck Hitch

Item # C602

lowest price pledge


Our Price: $76.95

You Save: 32%
Hitch Ball

Orders above $99 qualify for Free Shipping

Shipping Weight: 20 lbs

In Stock
C602 - 4 Inch Offset Curt Gooseneck Hitch Ball
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
Please enter a valid email address.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

pop out icon replay 360 icon
horizontal rotate icon

Product Images

Customer Photos


  • Gooseneck Hitch Ball
  • 2-5/16 Inch Diameter Ball
  • Double Lock Ball
  • 20000 lbs GTW
  • Curt
  • Chrome-Plated Steel
  • 4 Inch Offset
Designed for use with Curt's Double-Lock, Flip and Store gooseneck hitch, this ball with extension provides 4" of offset to fit your towing needs. Call 800-298-8924 to order Curt hitch ball part number C602 or order online at Free expert support on all Curt products. Guaranteed Lowest Price and Fastest Shipping for Curt 4" Offset Ball for Double-Lock Gooseneck Hitch. Hitch Ball reviews from real customers.

  • All Info
  • Reviews (20)
  • Q & A (42)
  • Videos (1)
  • Photos
  • Used (1)
  • Why etrailer?

Curt Hitch Ball - C602

Designed for use with Curt's Double-Lock, Flip and Store gooseneck hitch, this ball with extension provides 4" of offset to fit your towing needs.


  • Extension provides 4" of additional space between your truck's cab and your gooseneck trailer
  • Ball is chrome plated
  • This item is designed for use with Curt's Double-Lock gooseneck hitches
  • Made in USA


  • Ball size: 2-5/16"
  • Offset: 4"
  • Capacity: 20,000 lbs
  • Vertical load capacity: 5,000 lbs
  • Shank diameter: 2-5/8"

C602 Curt 4" Offset Ball

Video of Curt 4" Offset Ball for Double-Lock Gooseneck Hitch

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

Video Transcript for Curt Hitch Ball - Gooseneck Hitch Ball - C602 Review

Speaker 1: Today we're going to take a look at the Curt Four Inch Offset Ball for the Curt Double Lock Gooseneck Hitches. Now what happens when you need to pull a gooseneck trailer that has an especially long front over hang, well without the right amount of clearance between the overhang and your truck cab, tight corners can get to be a little tough. This Curt Double Lock Gooseneck Offset Ball will easily slide into any double lock gooseneck hitch and it sets your coupling point four inches back of the original trailer ball hole.The offset gooseneck trailer ball secures in place just like any other compatible gooseneck ball, using the double lock's dual pin locking system. Again, this extension will provide four inches of additional space between your truck's cab and your gooseneck trailer. The ball itself is chrome plated. The base is a durable black powder coat finish.

And again, this item is designed for use in the Curt's double lock gooseneck hitches. The part is made in the USA, the ball size, the gooseneck ball is a standard two and five-sixteenths diameter. Again the offset, which we measure from where it goes in to the hole to the center of the gooseneck ball, is going to be right at four inches. Weight capacity on this is 20,000 pounds. Vertical load capacity is 5,000 pounds, but you do want to make sure it never exceeds your vehicle's maximum gross weight rating.But that should do it for the review on the Curt Four Inch Offset Ball for the Curt Double Lock Gooseneck Hitch..

Customer Reviews

Curt 4" Offset Ball for Double-Lock Gooseneck Hitch - C602

Average Customer Rating:  5.0 out of 5 stars   (20 Customer Reviews)

Designed for use with Curt's Double-Lock, Flip and Store gooseneck hitch, this ball with extension provides 4" of offset to fit your towing needs.

- C602


The Curt goose neck hitch is a great product built very well. etrailer was a pleasure to work with delivering the product to my doorstep on time and complete. I would definitely use them again in the future. 447610

- C602


Not bad to install I really like the Curt hitch and offset ball, great price fast shiping would not hesitate to buy from etrailer again. The offset ball helped a lot, I didn't think I would be able to leave tool box on truck but had plent of clearance. 398554

- C602


Great product from curt... Drops right in.. Shipping was on time... A+++ Needed for the short bed!! 570182

- C602


Great product from curt... Drops right in.. Shipping was on time... A+++ 570181

- C602


This is for my 4' square hole trailer hitch extension. I love the fact that I can turn my trailer without breaking the back window. I had never seen a square hole before and this item came that way. I only wish they did one 6"-8" longer. But so far so good. 569506

- C602


Excellent service,fast delivery. Very good pricing. 562725

- C602


When you order products from etrailer you won’t be disappointed. A real live person actually answers the phone!!! Lisa answered our call and was friendly, curteous and very knowledgeable about the hitch extender I needed. She said it would arrive Tuesday and IT DID!!! I definitely recommend etrailer !!! 605349

- C602


Works as it is designed to. Pulled rv cross country and back. 598756

- C602


Curt 4" offset ball Haven't had a chance to use it. Looks as if it will fill my needs 594948

- C602


Easy to install, gave me the extra clearance I needed. 517658

- C602


I can use this with my offset hitch to get more clearance on my truck 496286

- C602


Good quality. Ok off set.could use a few inches more 391435

- C602


I usually pull my trailers with a long wheelbase truck but my newest truck is a short bed. The hitch is too far forward but this works perfect pulling the horse trailer. 345133

- C602


Everything installed as advertised. Did all on my own just take your time and you will be fine also. 2006 duramax crew cab use for horse trailer and flatbed gooseneck. 333005

- C602


No complaints yet. 256186

- C602


Works well to give needed room for short box pickup and Fifth wheel camper. 206574

- C602


This is a must have with 5 1\2 bed 159683

- C602


The hitch fit like it was supposed to. It has load limits on the hitch and the ball so you cannot forget it. I like that. 132813

- C602


great product, just what I was looking for. 69753

- C602


works great and fast shipping. 25037


Ask the Experts about this Curt Hitch Ball
Do you have a question about this Hitch Ball?

  • Curt Pop-In or Ford and Ram OEM Compatibility with Offset for Better Turning Clearance
  • The Curt 4" Offset Ball for Double-Lock Gooseneck Hitch # C602 is available only if you have the double-lock model. The other Curt models that drop in and lock through the ball lever like # C60601 featuring the Pop-In or OEM Underbed System will not have the offset option available, so it is a bummer the dealer didn't give you what you asked for with your 2018 Ram 2500 Laramie. To give you the clearance you desire, the other option is to use a gooseneck coupler offset like # BWTEXA4200...
    view full answer...

  • Comparing Curt Double Lock Gooseneck Hitch # 60720 to # 60683
  • The Curt Double Lock # C60720 and the Curt EZr Double Lock # C60683 are basically the same gooseneck hitch. The difference is in the installation. The EZr gives you the ability to ensure the hole you drill in the bed is perfect without the need to measure. It instead uses the Center locator tool that allows you to drill from the bottom up for a perfect fit. The regular Double Lock system simply requires measuring and then you drill from the top down. If you are good with a tape measure,...
    view full answer...

  • Gooseneck Clearance Equation and Offset Ball Options for 2017 Ford F-350 Short Bed
  • For your 2017 F-350 short bed, the clearance calculation is the measurement from the cab to ball center minus 1/2 the trailer width. This will give you the minimum clearance. If that number is positive the trailer will not interfere with the cab of the truck, but if it is negative then it will interfere and you need to be extremely cautious. We do have offset hitch balls that are hitch specific to gain more clearance and we also have the B&W Extend-A-Goose Gooseneck Coupler - 2-5/16"...
    view full answer...

  • Gooseneck Ball Compatible With 2017 Ford Super Duty Truck with Factory Rail Kit
  • The Curt 4" Offset Ball for Double-Lock Gooseneck Hitch # C602 will not fit a factory gooseneck system. The Curt Ball and Safety Chain Loop Kit for Chevy, Ford, GM, and Nissan Underbed Gooseneck Trailer Hitch # C60692 is the proper fit for your 2017 Ford Super Duty truck. There is not an offset option available at this time.
    view full answer...

  • Recommended Curt Gooseneck Hitch for 2018 Chevy Silverado 1500 with 5-1/2 Foot Bed
  • I do have a solution for you, however the Curt Double Lock Underbed Gooseneck Hitch # C607-604 referenced in your question is only designed to fit the 2018 Silverado 2500 or 3500 that features a longer bed. It will not work on your Silverado 1500 that has the 5-1/2 foot bed. For the Curt Double Lock Gooseneck Hitch that is designed to fit your truck you instead need the part # C615-632. This is confirmed to fit and includes custom brackets that use existing holes in the truck's frame...
    view full answer...

  • Recommended Gooseneck Trailer Hitch Extender For 2016 Ram Truck With Short Bed
  • We do offer offset gooseneck hitch balls but they are designed for specific gooseneck hitches. If you have a Hide-A-Goose Underbed Gooseneck Trailer Hitch, I recommend part # 19308. This extender has a 5-inch offset. If the gooseneck hitch in your truck is B&W Turnoverball hitch, the 4-inch extender I recommend is Part # BWGNXA4085. If you have a Curt Double-Lock, Flip and Store gooseneck hitch, then the 4-inch extender I recommend is part # C602.
    view full answer...

  • Gooseneck Extension for 2005 Dodge Ram Truck with 6 ft Bed
  • You can measure from the center of your existing gooseneck ball to the back of the cab on the Dodge and then measure the width of the trailer loft and divide that by two. If the measurement from the center of the hitch ball to the cab is 4 inches greater than one half the width of the trailer you should have room for clearance. If not you will need to purchase an offset gooseneck ball that is long enough to provide the 4 inches clearance needed to accommodate pitch and roll of the trailer...
    view full answer...

  • Do I Have Enough Clearance On my Ford F250 6 ft bed to Turn Sharp with a Gooseneck Trailer
  • In order to determine if you will have enough clearance or how much of an extension would be required to safely execute a 90 degree turn you will need to take a few measurements and use the following formula. The formula looks like this: (A + B) - C = Clearance Where A equals distance from center of gooseneck coupler to truck cab, B equals the distance in front of or behind the the front of your trailer the center of the coupler is. So if there was an overhang on the front of the...
    view full answer...

  • Can An Offset Gooseneck Hitch Ball Be Used With An Extended 5th Wheel To Gooseneck Adapter
  • It sounds to me like you have a 5th wheel to gooseneck adapter like the Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter part # AM3100 already installed on your 5th wheel trailer. To answer your question, yes, a 5th wheel to gooseneck adapter is compatible with an offset gooseneck hitch ball. It is important to not that an offset gooseneck adapter, such as part # AM3139, should not be used with an offset gooseneck ball. However, as gooseneck hitch balls are specific to the...
    view full answer...

  • Will Reese Gooseneck Hitch Ball with 5 Inch Offset Fit Curt Gooseneck Hitch
  • We have some options for you to have an offset for your gooseneck, but the Reese Gooseneck Hitch Ball with 5 Inch Offset # 19308 will not work with the Curt gooseneck hitch in your 2015 GMC Sierra 3500. The # 19308 is designed to work with Reese Hide-A-Goose gooseneck hitch heads. The only Curt offset gooseneck hitch ball we offer is the Curt 4 Inch Offset Ball for Double-Lock Gooseneck Hitch # C602. This hitch ball is designed for use with Curt's Double-Lock gooseneck hitches. If...
    view full answer...

  • Offset Hitch Gooseneck Ball and 5th Wheel Trailer to Gooseneck Hitch Adapters
  • The Curt offset ball, # C602, is designed for use with the Double-Lock, Flip and Store gooseneck hitches. If you have a different hitch then this ball is not going to fit. You will need to go by the hitch manufacturer to get a compatible ball. If the trailer is a 5th wheel trailer and not a gooseneck trailer then you will need an adapter to be able to tow the trailer. A 5th wheel king pin is not compatible with a gooseneck hitch ball. The best option is the Goosebox, # RP94622, for Lippert...
    view full answer...

  • Compatibility of Reese Goose Box Dimensions With Ram Truck
  • For your 2013 Ram 2500 Crew Cab Short Bed, the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter # RP94622 is a fit as long as you don't have RamBox. I reached out to my contact at Reese to confirm and they even sent me an engineer drawing of the newer model Ram with the higher walls and shows how the Goose Box is compatible. I've attached it to assist as it gives some measurements for you as well. The Curt EZr # C60682 is the fit for your truck and the Curt 4" Offset...
    view full answer...

  • Gooseneck Hitch Recommendation for 2013 Ram 1500 with Rambox and Active-Level Suspension
  • When it comes to a gooseneck hitch that will work on your 2013 Ram 1500 with Rambox, 6 ft bed, and Active-Level air suspension, Curt offers the Double Lock, Flip and Store, Underbed Gooseneck Hitch with Installation Kit, # C607-658. This gooseneck trailer hitch provides a sturdy, secure connection for towing your gooseneck trailer and also allows for a clean, unobtrusive look for your truck bed when you aren't towing. To simplify installation, Curt manufactured the Installation Tool,...
    view full answer...

  • Can I Make a 90 Degree Turn with the Reese Goosebox
  • You're definitely going to want to do some test runs after installing a Goose Box, like part # RP94720, or a trailer because you're correct that it's very unlikely you can make a full 90 degree turn. A Goose Box also doesn't increase your turning clearance either. In order to increase clearance to make turns you need to use a goosneck ball with an offset, such as part # C602. You need to choose an offset ball that fits your specific gooseneck hitch.
    view full answer...

  • USA Made Gooseneck Hitch Recommendation for a 2011 Ford F-250
  • Both of the gooseneck hitches you mentioned would work well for you, but since you asked about which is made in the USA I would recommend the Curt part # C60720 as it is made in the USA and the Draw Tite is no longer made here. Since your truck is a short bed you will want the offset part # C602 to give you additional clearance. For a 7-way to install in the bed of your truck to make connecting your trailer lights easier you would want the part # 41157. Most 7-ways will be at the...
    view full answer...

  • Offset Hitch Ball for a 2017 Ram 2500 with Factory Puck System
  • I do have an option for you but they do not make an offset gooseneck hitch ball that will work with the factory puck system on your 2017 Ram 2500 which includes the Curt 4" Offset Ball for Double-Lock Gooseneck Hitch part # C602. Instead, you are going to want to use the B&W Extend-A-Goose Gooseneck Coupler part # BWTEXA4200 which fits most trailers with a 4" diameter outer tube and will provide you with a 10" offset. I have attached a review video for you as well.
    view full answer...

  • Gooseneck Hitch For Nissan Titan With 5-1/2 Foot Bed
  • The Curt Double Lock, Flip and Store Underbed Gooseneck Hitch w/ Installation Kit # C620-664 is one of the only hitches on the market that will work with the 2007 Nissan Titan 5-1/2 Foot Bed. This product has a removable 2-5/16 hitch ball that stores in the hitch. There is no drilling required to install the frame brackets of the installation kit. the Installation rails are rated to meet vehicle manufacturer's tow rating. (see vehicle owner's manual) If you need wiring Curt 5th Wheel/Gooseneck...
    view full answer...

  • Will the Reese Goose Box # RP94622-61301 Work with a 2006 Chevy Silverado 2500HD with 6.6 Foot Bed
  • The Goose Box will not extend your king pin any further than the OEM Lippert 1716 pin box it replaces. To determine if it will provide enough clearance for turns, you will need to take a few measurements and make a few calculations. You will need to measure the distance between the center of the existing gooseneck ball and the rear of the truck cab. If the king pin extends past the front face of the trailer, the distance it extends should be added to the distance from the cab to the...
    view full answer...

  • Will A Curt Offset Gooseneck Ball Fit Into A B&W Gooseneck Hitch
  • I called my contact at Curt Manufacturing and they confirmed that the Curt 4" Offset Ball for Double-Lock Gooseneck Hitch part # C602 will not fit into the gooseneck ball location on a B&W gooseneck hitch such as the B&W Turnoverball Underbed Gooseneck Trailer Hitch part # BWGNRK1012. This is due to the fact that the Curt ball mounts for gooseneck hitches are circular in shape whereas the ball mounts for B&W gooseneck hitches are square. In order to gain a 4" offset with the B&W gooseneck...
    view full answer...

  • Can 2018 GMC Sierra 1500 5-1/2 foot Bed Tow Gooseneck Trailer
  • For a truck like your 2018 GMC Sierra 1500 that has a 5-1/2 foot bed it's typically not recommended to try and tow a gooseneck or fifth wheel hitch trailer. Unless the nose is tapered like a stock trailer where there's essentially no nose you'll have turning clearance issues. If the nose is tapered like that we have the Curt gooseneck hitch part # C615-632 as a confirmed fit which will work well. This hitch gives you a setup where you can flip the ball upside down when not needed and is...
    view full answer...

  • Gooseneck Hitch Recommendation for a 2006 Chevy Silverado 1500 with 5-1/2 ft Bed
  • I did some checking and the only confirmed fit I could find for a gooseneck hitch for your 2006 Chevy Silverado with a 5-1/2 foot bed is the Curt Hitch part # C60712. For additional clearance you will most likely need the part # C602.
    view full answer...

  • Gooseneck Hitch Fit for 2015 Chevrolet Silverado 3500 Dually Long-Bed Pickup
  • Curt Double Lock Flip and Store Underbed Gooseneck Hitch # C607-604 is a confirmed fit for your 2015 Chevrolet Silverado 3500 dually long bed. The linked video shows installation in a 2013 Sierra. This hitch is compatible with Curt's accessories like their X5 5th Wheel Adapter # C16210 and their 4-Inch Offset Ball # C602. If you also need a wiring harness for the truck you can use part # C56000.
    view full answer...

  • Recommendation for a Fold Down Gooseneck Trailer Hitch for a 2011 GMC Sierra 2500HD Short Bed Diesel
  • For your 2011 GMC Sierra 2500HD short bed, you can use the Curt Double Lock Gooseneck Hitch and Rail Installation Kit, # C607-604. My contact at Curt said that with a 6 foot bed and diesel the installation kit should still fit. Since you do have a short bed and crew cab, you may also need an offset ball. You can use # C602 which is compatible with the Double Lock hitch and has a 4 inch offset.
    view full answer...

  • Gooseneck Ball Hitch For 2016 Chevorlet Silverado 1500 With 5-1/2 Foot Bed
  • We do have gooseneck hitches that will fit a 2016 Chevorlet Silverado 1500 truck with the 5-1/2 foot bed. However, the Curt hitch model # C61301-52 that you referenced is an over the bed hitch that was not designed to fit in a 5-1/2 bed. If you are looking for an over the bed gooseneck ball hitch the Curt Overbed, Folding Ball Gooseneck Trailer Hitch with Installation Kit, # C61331-52 is designed to fit a 2016 Chevy Silverado with the 5-1/2 foot bed. If you are interested in a below...
    view full answer...

  • Can the CURT Offset Gooseneck Ball for Double-Lock Gooseneck Hitches be Turned 180 Degrees
  • I spoke with my contact at CURT about the orientation of the Offset Ball for Double-Lock Gooseneck Hitch, # C602. He stated that it can be inserted either way, to be closer to the cab or closer to the tailgate. You will be able to lock it in in either position.
    view full answer...

  • Gooseneck Hitch Ball Recommendation for Curt Gooseneck with Taller Height
  • Since you have a Curt gooseneck hitch the best option we have would be the Curt 4 inch offset double lock ball part # C602 which has a 4 inch offset and sits taller than the standard hitch balls.
    view full answer...

Do you have a question about this Hitch Ball?

Used Items Available

Condition: Missing Parts

Notes: Missing double lock pins.

Our Price: $79.11

Secure Checkout

  • Why

    At we guarantee:

  • Highest quality hitch ball for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate hitch ball information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Satisfaction Guarantee
    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Photos by:
Theodore B
Written by:
Lindsey S
Expert Research:
Michael H
Installed by:
Jeff D
Expert Research:
Jameson C
Expert Research:
Jeffrey L
Updated by:
Sarah W
Photos by:
Jeffrey L

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!

Call 800-298-8924

About Us
photos and videos
1,056,204 Original Photos & Videos

Produced to make sure you know what you are getting and you get exactly what you need.

35,570 Installations Completed

To make sure products work and fit the way they are supposed to.

etrailer call center
2,476,511 Phone Calls & Emails Answered

1,125,924 phone calls and 1,350,587 emails to help find the right solution.

etrailer training
400+ Average Hours of Product Training

We get to know our products firsthand so experts can better help you.

etrailer service
73 Years of Quality Customer Service

Assisting our neighbors and customers, face to face at the counter.

etrailer experts
193,357 Pages of Expert Information

Created to make sure you have all the answers to your questions, from real experts.