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  1. Trailer Hitch Lock
  2. CURT
  3. Fits 2 Inch Hitch
  4. Standard Pin Lock
  5. Keyed Alike
  6. 3-1/4 Inch Span
  7. 4-1/4 Inch Span
Curt Lock Set for Adjustable Channel-Style Mounts

Curt Lock Set for Adjustable Channel-Style Mounts

Item # C23556
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Retail:$93.36
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Trailer Hitch Lock
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Shipping Weight: 1.45 lbs
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This Curt lock set for adjustable channel-style ball mounts is keyed alike, and includes 4 keys. Lowest Prices for the best trailer hitch lock from CURT. Curt Lock Set for Adjustable Channel-Style Mounts part number C23556 can be ordered online at etrailer.com or call 1-800-496-5010 for expert service.
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  • Reviews (59)
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  • Videos (2)
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  • Why etrailer?

CURT Trailer Hitch Lock - C23556

  • Fits 2 Inch Hitch
  • Standard Pin Lock
  • Keyed Alike
  • CURT
  • 3-1/4 Inch Span
  • 4-1/4 Inch Span
  • Steel
  • Bent Pin

This Curt lock set for adjustable channel-style ball mounts is keyed alike, and includes 4 keys.


Features:

  • For use with Curt Channel Style Adjustable Ballmount (C45900 or C45902)
    • Use of these pins retains the full capacity of the ball mounts C45900 and C45901
  • Locks measure 6-1/4" overall
  • Pin inside widths measure 3-1/4" and 4-1/4"
  • Pin diameters: 5/8"
  • Locks are keyed alike and include 4 keys


23556 Curt Lock Set for Adjustable Channel-Style Ball Mounts




California residents: click here


Video of Curt Lock Set for Adjustable Channel-Style Mounts

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




Video Transcript for Curt Lock Set for Adjustable Channel-Style Mounts Review

Speaker 1: Today we'll be taking a look at the Curt Channel Mount Lock Set, part number C23556.Without any locks, this could be you.But with our locks installed, you're safe and secure. This locking system is designed to work specifically with your Curt Adjustable Ball Mount, part number C45900, and C45902. Both locks feature a barbell style clamping mechanism that will work with either the hitch pin or the ball mount pin. Four keys are included, and any key will work with any of the matching locks. There's a dust cover on the end of each lock to keep out dirt and grime. The curved handle on the hitch pin makes for easy removal and installation.They feature a 6-1/4" overall total length.Included in the kit you'll get one hitch pin, one ball pin, and two locks.

These locks are keyed the same, so you have a total of four keys.We will start by installing the hitch pin. Remove the old one, slide in the new one, unlock your lock, slide it on, lock it up, and close the dust cover. Next, we'll install the ball pin. Remove the old pin, slide in the new locking pin. Again, unlock the lock, slide it on, lock it up, close the dust cover, and you're good to go.

Either pin can be replaced with the locking pin to secure your ball mount. Now, with our locks installed, we can feel safe knowing that our ball and our adjustable mount aren't going anywhere.That completes our look at the Curt Channel Mount Lock Set, part number C23556.


Customer Reviews

Curt Lock Set for Adjustable Channel-Style Mounts - C23556

Average Customer Rating:  4.6 out of 5 stars   (59 Customer Reviews)

This Curt lock set for adjustable channel-style ball mounts is keyed alike, and includes 4 keys.

by:

The locks are big enough to fit both my hitch and ball hitch. 4 keys included makes it very convenient. Shipped very quickly.


Comments
The Locks are working great. Very happy with the product.
Ernesto - 01/21/2022


by:

This locking pin is definitely long enough for the Curt 14,000 lb adjustable ball mount. In fact, its probably about a half an inch too long. The locking part flops around a bit, I wonder if it would come off with a good smack from a hammer. I'm going to try shoring it up with a few 5/8 inch washers.




by:

Though the product looks to be of good quality, the design in my opinion is poor. When the locking portion is attached to the pin(s), there is a gap between the two. This gives a purchase point to a would-be thief to get a prying tool in there. This may seem nit-picky, but this is a security lock set that is supposed to protect a trailer and hitch ball assembly.




by:

I'm thinking I probably just got a bad set of these but I have struggled with the locks ever since they were new. The keys don't want to work! Always have to fiddle and jiggle with the locks for an annoyingly long time to get them to work.


Comments
Perhaps some lubrication is needed for a smooth entry. Next time, if you want to try a barrel key like item # BD580400
Bulldog Lifelong Trailer Hitch Lock - Class III and IV Hitches - Bent Pin - 3-1/4" Span
$18.73
, they are easier to maneuver in my opinion.
-- Etrailer Expert Sierra K - 01/15/2022


by:

Seems to be sturdy enough to keep my new Curt 45900 adjustable trailer hitch secure to my vehicle. I like the fact that the keys are all the same. etrailer customer service is great! Thanks to Michelle!




by:

Exactly what I wanted. Heavy duty and fit perfectly. I installed this by myself in about 2 hours . Hitch, wiring harness and bracket.




by:

These locks are great, I ordered more for my adjustable hitch, I've had one for about three years or more. They work great, ( I do put a little oil on them from time to time just to make sure)


Comments
These types of locks normally dont work. The Curt locks work and still work even now after a year I have not sprayed oil on them, there is no need, they are still in great shape! I highly recommend these locks
Brad - 09/07/2021


by:

We carry several different trailers for our adapted sport programs, which meant we needed to get a hitch receiver with an adjustable height. This lock worked perfectly for our situation and would buy it again for our next truck.


Comments
Great lock and we have had no issues
Wes - 01/28/2021


by:

This is my second set that I have bought my son took over my first set.They are a great asset to my channel hitch.Both locks are keyed alike less keys to carry a round.And like always etrailer comes through with fast shipping and great prices.Thanks again




by:

Good set. Seems strong and reliable enough. I don't like the keys. The plastic head on the key serves only one function, it adds bulk to the keychain and a bigger bulge in your pocket.




by:

I chose these items because they were suggested when I purchased a heavy duty ball hitch. They did not fit the hitch very well and I ended up purchasing a different locking pin for the hitch. The product is a great product and I will keep them for other applications, however, I believe a recommended item should complement the product being purchased not simply related.




by:

What can I say about the locking pins? They fit. Hopefully the locks won't have to prove themselves, but there isn't a lot more to say about them unless someone tries to steal the ball or mount. Then we'll know how good they are at preventing theft.




by:

It has to made clearer if you want to buy both the
Locking pin and the height adjustment pin, I ordered the wrong set.




by:

Locks look pretty good. Little long for me, made spacers so you can't stick prybar
between lock and hitch and pop off. Easy to lock and unlock. Now I can relax when hitch is on truck and not hooked to trailer.




by:

I ordered these locking pins for my new ball mount trailer hitch so it wouldn't come up stolen some time. I liked the Master Lock pins better but couldn't get two keyed alike.




by:

These have functioned well. Unfortunately because I have a short driveway the ballmount has to come off when I get home, so a lot of on and off for these, but no issues.




by:

Good product, fit the 3" hitch on my '15 Chevy2500 with a little room to spare. I'd like to see another 1/4" for the hitch lock, but it did the job well.




by:

I read a review buy someone on the site to use these pins with the Curt hitch that I also purchased. Only one of them fit so that part isn't great, but the one that does fit still secures the hitch so that it can't be easily stolen/tampered with.




by:

I ordered a hitch and locking pins. All were nicely packaged and delivered very quickly.




by:

etrailer does it right, ordered it on Wednesday afternoon came on Friday. Curt hitch was just as described, looked awesome on my truck. Thank You




by:

Really an amazing outfit. The web page provides all the detail needed to make the right choice on parts so its right the first time. The staff are friendly and caring and the delivery was spot on. etrailer is how web shopping ought to be done. They truly set the standard.




by:

Good product




by:

Keeps the Curt Adjustable 2-Ball Mount from disappearing...:)




by:

Lowest price around; was here in a few days. Would buy from again. Just as advertised will keep thieves from stealing my hitch overnight hotel stays while traveling.




by:

Perfect way to deter a thief from stealing your nice adjustable hitch, the pin for the receiver was long enough to use in my ‘12 2500HD 2-1/2” receiver.



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Show More Reviews

See what our Experts say about this CURT Trailer Hitch Lock



  • Weight Capacity of Curt Locking Trailer Hitch Pin Set # C23556
    Hitch pins like # C23556 do not have a weight rating or shear strength data because their actual capacities far exceed the abilities of the hitch or vehicle. Basically, the hitch or some other component would fail before the pin even comes close. The pins are 5/8 inch diameter steel. The straight pin has a usable length of 4-1/4 inches and the other 3-1/4 inches. The pins measure approximately 6-1/2 inches long overall.
    view full answer...
  • Will Curt Lock Set # C23556 Fit OEM 2-1/2 Inch Trailer Hitch on a 2013 Dodge Ram 3500
    For the Curt lock set # C23556, the inside width of the shorter one is 3-1/4 inches, the longer one is 4-1/4 inches. The typical outside width of a 2-1/2 inch trailer hitch is 3 inches so provided that the outside width of your hitch is under 3-1/4 inches or 4-1/4 inches, this lock set will work great for you.
    view full answer...
  • Will the Curt Lock Set for Adjustable Ball Mounts C23556 Work With a 2-1/2 Inch Receiver Tube
    Yes, the Curt Lock Set for Adjustable Channel-Style Mounts part # C23556 will work with the 2-1/2" receiver tube on your 2015 Chevrolet Silverado 2500. The j-style pin lock will be used in the receiver tube and the straight style pin lock will be used on the channel. The kit comes with four keys that are all keyed alike.
    view full answer...
  • Are All of the Curt Lock Sets C23556 Keyed the Same
    I spoke with my contact over at Curt about lock set # C23556. He said that while the exact number is not known there are potentially thousands of possibilities. One thing is certain though and that is that they are not all the same!
    view full answer...
  • Recommended Adjustable Ball Mount for 1/2 Ton Silverado for Use with Towtector Mud Flaps
    For your adjustable height ball mount for use with your Towtector mud flaps, I recommend the Curt Channel Style Adjustable Ball Mount # C45900 along with the lock set # C23556 to protect your investment. This steel ball mount is powder coated and has two adjustment holes for your pin to allow for your mud flap installation and will help you to avoid any galvanic corrosion from dissimilar metals that may be an issue with aluminum ball mounts.
    view full answer...
  • Availability of Locking Pins for Curt Channel Style Adjustable Ballmount # C45900
    I pulled a piece of this ball mount from inventory to take the measurement you requested. The internal width of the channel on the Curt Channel Style Adjustable Ballmount # C45900 is 3-1/8 inches. Please note that we do offer a locking pin set from Curt that is intended for use with this specific ball mount; the pin set is part # C23556. This includes two 5/8-inch diameter locking pins, each with 2 keys. I confirmed with my technical contact at Curt that use of this pin set will retain...
    view full answer...
  • Locking Pins for Curt Channel Style Ball Mounts
    We have just what you're looking for to lock the hitch ball onto the channel mount of the Curt # C45927. I recommend using the Curt Lock Set for Adjustable Channel-Style Mounts # C23556, which is designed to work with this series of Curt channel style ball mounts. I've linked a short review video of this lock set for you to have a look at.
    view full answer...
  • Locking Pin Set for Curt C45900 Channel Style Height Adjustable Ball Mount
    Curt does indeed offer a lock set specifically designed for their channel style adjustable ball mounts like the # C45900 you'd earlier purchased. I'd recommend the # C23556 which includes a keyed alike hitch lock and a locking pin that would take the place of one of the height adjustment pins. The locking adjustment pin has a 4-1/4 inch span, so it will accommodate the width of the ball mount with no problem as you can see in the linked video.
    view full answer...
  • Can Grade 8 Bolts be Used in Place of Pins and Clips for Curt Adjustable Ball Mount # C45900
    Assuming you use appropriately sized grade 8 bolts for the Curt Channel Style Adjustable Ball Mount # C45900 there isn't a particular reason you couldn't them and some lock nuts in place of the included pins and clips. Even though the Grade 8 bolts will be strong enough for this application please just keep in mind that since you are modifying the ball mount it likely wouldn't be covered under warranty if anything were to happen. This may have been the set you already looked at but we...
    view full answer...
  • Availability of Locking Pin For Curt # C45902 Adjustable Ball Mount
    There is indeed a locking hitch pin set, part # C23556. This part number includes two locks, one hitch pin lock and one locking pin that would replace one the retaining pins that keeps the ball assembly in place. The locks are keyed alike.
    view full answer...
  • Are the Locks in Curt Lock Set for Adjustable Channel-Style Mounts # C23556 Keyed Alike
    Yes, my contact at Curt Manufacturing confirmed that the two locks and the four keys included in their Lock Set # C23556 are keyed identically. This lock kit is intended for use in Curt's Channel Style Adjustable Ballmount # C45900.
    view full answer...
  • Recommended Locking Hitch Pins for Curt Channel Style Adjustable Ball Mount
    To secure the Curt Channel Style Adjustable Ball Mount # C45900 to your vehicle, I recommend the Curt Lock Set # C23556. This lock set is designed specifically for channel-style ball mounts like this one. It includes a locking pin to secure the ball mount to the hitch receiver as well as a locking pin to secure the ball platform to the actual mount. This will do a great job at helping to deter theft of your valuables. I have attached a short video demonstration on this product so you...
    view full answer...
  • Locking Pins for Curt Adjustable Ball Mount # C45902
    For Curt adjustable ball mount # C45902 the locking pin set is # C23556. The pins don't have an official capacity but technically 5/8 inch diameter solid steel is going to have a capacity much higher than the hitch or vehicle. The hitch pin has a useable span of 3-1/4 inches which should be long enough for the outer width of your 2-1/2 inch hitch but it never hurts to measure to be sure.
    view full answer...
  • Compatibility of Curt Locking Pins on Curt Adjustable 2-Ball Mount C45902
    Yes, the Curt locking pins # C23556 will work great for the Curt Adjustable 2-Ball Mount # C45902. I was able to go out to the warehouse and confirm the fit for you.
    view full answer...
  • Will Curt Lock Set for Adjustable Channel-Style Mounts Fit Curt Adjustable Ball Mount Receiver
    I spoke with my contact at Curt and he confirmed the Curt Lock Set for Adjustable Channel-Style Mounts # C23556 is designed for use with Curt Channel Style Adjustable Ballmount # C45900. This part includes two 5/8-inch diameter locking pins, each with 2 keys, which will allow you to retain the full capacity of the Curt Channel Style Adjustable Ballmount. I have included a link to a video review of this ballmount for you to check out.
    view full answer...
  • Recommended Locking Pin Set For Curt Adjustable 2-Ball Mount # C45902
    We have just what you need. For your Curt Adjustable 2-Ball Mount - 2-1/2" Hitch - 6" Drop, 5-1/4" Rise - 20K # C45902 you will need the Curt Lock Set for Adjustable Channel-Style Mounts # C23556 which was made specifically for this ball mount and will be plenty stable at 20000lbs. I included videos of the products mentioned for you to take a look at.
    view full answer...
  • Locks For Curt Channel Style Ball Mount C45900
    We do have a lock, though the one you mentioned isn't long enough to work with the Curt Channel Style Ball Mount # C45900. What you will need instead is a lock set that is designed specifically for use with this ball mount, and includes both a hitch lock and a lock that secures the hitch balls to the channel; the correct part for this is the following: - Curt Lock Set for Adjustable Channel-Style Mounts # C23556 I have added a link below to a video review for you to check out as well...
    view full answer...
  • Recommended Locking Pins For Curt Channel Style Adjustable Ball Mount C45901
    There sure is! The correct locking pins for the Curt Channel Style Adjustable Ballmount - 5-1/4" Rise, 6-3/4" Drop - 6,000 lbs # C45901 is the Curt Lock Set # C23556. This set includes one lock to lock the ball mount section to the channel, and one lock to lock the coupler to your trailer hitch receiver. I included videos of the products mentioned for you to take a look at.
    view full answer...
  • Recommendation for Making the Channel Style Adjustable Ballmount Lockable
    The best recommendation I can give you would be to get a Curt Lock Set for Adjustable Channel-Style Mounts # C23556. These locks are rated to handle the weight and are lockable to act as a theft-deterrent. Dimensionally the Trailer Hitch Receiver Lock # e98881 that you referenced might fit to hold the ball mount platform in the Channel Style Adjustable Ballmount # C45900, but since it is not rated to handle the weight it would see in that position I cannot safely recommend you attempt...
    view full answer...
  • Recommended Locking Hitch Pin and Adjustment Pin for Anderson Aluminum Rapid Hitch
    The Rapid Hitch Trailer Hitch Lock and Adjustment Pin Lock Set for 2" and 2-1/2" Hitches # AM3492 is what you were describing. The locking pins are 5/8 inches and have an inside width of 4-1/4 inches. If you want a different brand I recommend the Curt Lock Set for Adjustable Channel-Style Mounts # C23556 which will have that same 4-1/4 inch span and give you a keyed alike adjustment lock and hitch lock. I've attached videos of this product to assist.
    view full answer...
  • Recommended Keyed Alike Locks for MaxxTow Adjustable 2-Ball Mount MT70380
    The MaxxTow Adjustable 2-Ball Mount MT70380 can use the Curt Lock Set for Adjustable Channel-Style Mounts # C23556. This will secure the ball and the hitch if you use one pin with cotter pin on the ball. If you want 3 all keyed alike, then I recommend the Trailer Hitch Receiver Lock - Flush Design for 2" Trailer Hitches # e98880.
    view full answer...
  • Can Replacement Keys Be Obtained for Curt Lock Set for Adjustable Channel-Style Mounts
    I do have an option for you but there are no replacement keys available for the Curt Lock Set for Adjustable Channel-Style Mounts part # C23556. If the keys can no longer be found then you can either call a locksmith to unlock them or just use a sawzaw/cutoff wheel to remove them which is what I would do since you can't reuse them even if you get it off in one piece. They can then be replaced with the Rapid Hitch Trailer Hitch Lock and Adjustment Pin Lock Set part # AM3492.
    view full answer...
  • Locking Pins For Adjustable 2 Ball Mount Trailer Receiver Hitch
    The Curt Slim Adjustable 2-Ball Channel Mount # C46KR has a 5/8" pin that holds the ball to the adjustable rail. The rail itself is 2" wide. I recommend the Curt Lock Set # C23556 as being a lockset for their ball mount. It will give you both pins and a keyed alike lock for the draw bar and ball.
    view full answer...
  • Recommended Adjustable Ball Mount to Allow Drop for Trailer Coupler to Ride Level
    For a 2 inch hitch like the Curt Class III # 13323, you will want to make sure you have a custom fit for your truck. If you give me the year, I am happy to assist in getting you a hitch receiver confirmed to fit properly. I recommend an adjustable ball mount so you can tow multiple trailers level. I have attached an article to assist with this whether you decide to use a fixed mount for a specific trailer or an adjustable mount to give you more options. I've linked the page to all your...
    view full answer...


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