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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
Retail:$111.95
Our Price: $73.00
You Save: 35%
Trailer Hitch Lock
Shipping Weight: 1.48 lbs
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This Curt lock set for adjustable channel-style ball mounts is keyed alike, and includes 4 keys. Great 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 1-800-940-8924 for expert service.
  • All Info
  • Reviews (79)
  • Q & A (0)
  • Videos (2)
  • Photos

CURT Trailer Hitch Lock - C23556

  • Fits 2 Inch Hitch
  • Standard Pin Lock
  • Keyed Alike
  • 3-1/4 Inch Span
  • 4-1/4 Inch Span
  • Steel
  • CURT
  • 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, C45902, or C45927)
    • 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 Satisfaction Score:


Customer Reviews

Curt Lock Set for Adjustable Channel-Style Mounts - C23556

Average Customer Rating:  4.5 out of 5 stars   (79 Customer Reviews)

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

by:

As others have stated, these are good locks but it does appear to have a weakness of being able to pop the lock off with a pry bar.

David P.

5/2/2024

I have used these items quite a bit over the last year and I am pleased with them. The only concern I have is that they dont seem to be a very strong locking mechanism. I feel like it wouldnt take much to pry off the lock. But so far no one has stolen my drawbar.



by:

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

Ernesto

1/21/2022

The Locks are working great. Very happy with the product.



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:

Excellent parts and fast delivery. Will buy from again if I need more trailer towing equipment



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:

Everything fits well and holds tight, order came super quick and the staff here at E trailer are very kind and respectful, showed up 3 days early to the middle of no where Texas, thanks again yall



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!

James

12/26/2022

Health issues have prevented me from using it. Hoping 2023 is a better year.



by:

Matched the description. Easy to use!



by:

Bought in fall of 2018. Kept them lubed up and they worked flawless, until the day I left it on my back bumper after taking off the hitch and driving away. But in the two years I did have them. Flawless! I would have gotten them again, but by time I realized what I had did, I needed something now. FYI: Cheap ones don't last as long.



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.

Wes

1/28/2021

Great lock and we have had no issues



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)

Brad

9/7/2021

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



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:

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'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.

Etrailer Expert

Sierra K.

1/15/2022

Perhaps some lubrication is needed for a smooth entry. Next time, if you want to try a barrel key like item # BD580400, they are easier to maneuver in my opinion.



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:

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:

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:

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:

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



by:

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



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:

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 like the fact that you don't have to use key to lock, push-on to lock



by:

Really great lock set. I wish that the second lock had a chamfered end on it so you could push it back on without the key in the lock.


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Show More Reviews

See what our Experts say about this CURT Trailer Hitch Lock

  • 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!
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  • 2 inch Trailer Hitch Locks For Curt Trailer Hitch
    The Curt Lock Set for Adjustable Channel-Style Mounts # C23556 is the correct kit you would need. This set includes a hitch receiver lock to secure shank to receiver and a locking adjustment pin to secure ball housing to shank. There are 4 keys are included and are keyed alike. I attached a review video link below.
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  • 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.
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  • Recommended Locks For Curt Adjustable 2-Ball Mount For 2-1/2 Inch Receivers
    We can take care of securing the Curt Adjustable 2-Ball Mount, part # C45902. We have the # C23556 kit that includes a straight locking pin for the ball mount that will work on the # C45902. The additional pin included will only work with a 2-inch receiver and will not work with the 2-1/2 inch shank on the # C45902. I called my contact at Curt and they told me that this will be available in the future but is not available now. We also offer locks that will work with a 2-1/2 inch receiver...
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  • What Hitch Balls Can Be Used With Curt Channel Style Adjustable Ball Mount
    While there isn't an additional ball mount for the channel, you wouldn't need one because you can use any size hitch ball with the Curt Channel Style Adjustable Ball Mount # C45901. This ball mount fits a hitch ball with a 1" diameter shank, and there are options for a 1-7/8", 2", and 2-5/16" hitch ball that will fit; you can use any of the following hitch balls: - 1-7/8" Hitch Ball # C40002 - 2" Hitch Ball # 63845 - 2-5/16" Hitch Ball # 63853 These will all fit securely in the ball...
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  • 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...
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  • 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...
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  • 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...
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  • 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.
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  • Curt Adjustable Pintle Hitch Compatibility With InfiniteRule Locking Pins
    Yes. The InfiniteRule Locking Pins for B & W Tow and Stow 10K and 14.5K Ball Mounts - Keyed Alike - Qty 4 # 34061775-D have pin diameters of 5/8 inch and spans of 4-1/18 inches and 3-1/8 inches. The Curt Pintle Hook with 2-5/16" Ball - 2" Hitches - 13,000 lbs # C45910-15-20 uses 5/8 diameter pins that are 4-1/4 inches 3-1/4 inches based on the designed locks # C23556. The Infinite Rule Locking pins will absolutely work for this application.
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  • Keyed Alike Hitch Locks for 3" and 2" Receivers
    The Curt Lock Set for Adjustable Channel-Style Mounts part # C23556 will do the trick. These pins are rated as high as any hitch and ball mount will be. The Longer one has a usable length of 4.25" while the shorter is 3.25" which will be great for your 3" and 2" receivers. While it is not the typical solution it is the only keyed alike option I currently have available. (May 2020)
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  • Locking Pin Recommendation for the Flash E Series Adjustable, Steel Ball Mount FA42-00-2800
    As long as the pin diameter matches up on your Adjustable Ball Mount part # FA42-00-2800 with the part # C23556 the locks being a bit too long would not matter. Normally we would recommend the part # AM3493, but if the Curt fits it would work as well.
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  • 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.
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  • How to Lock a Curt Spyder # 16085 to Fifth Wheel Rails
    What I recommend you get to lock your Curt Spyder part # 16085 to the fifth wheel rails of your truck is the Reese Pull Pin Lock Plates # RP58093 and then use a pad lock like part # ML1KA to lock the pins that hold the spyder to your rails. Check out the picture I attached to see how these products all work together.
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    Image 1 for
  • Recommendation and Procedure for Dolly Towing a 2013 Hyundai Elantra
    When dolly towing your 2013 Hyundai Elantra, your owners manual states to set the ignition switch in the ACC posion, shift into Neutral, and make sure the parking brake is released. Failure to put the vehicle in neutral can cause transaxle damage. For a tow dolly, I recommend the Roadmaster Tow Dolly with Electric Brakes - 4,250 lbs # RM-2050-1. This dolly will allow you to simply drive onto the ramps, secure the tires in the included wheel nets, and go. You will need a trailer connector...
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  • Locking Pin Sets For Curt Pintle Hook with 2-5/16" Ball # C45908
    I have a couple options you can use to secure the Curt Pintle Hook with 2-5/16" Ball # C45908 to your receiver. First is the Curt Lock Set # C23556 which includes one hitch/receiver lock pin and the 2nd keyed alike lock for replacing one of the height adjustment pins. We also have the InfiniteRule Locking Pins # IR57FR which includes all 3 locking pins keyed alike. These pins are stainless steel with a 42,000lb sheer rating.
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  • 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.
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  • Availability of an Adjustable Pintle Hook Mount for a 2-1/2 Receiver With 20,000LB Trailer Capacity
    I do have a couple options for you as the Pro Series Adjustable Pintle Hook Mounting Plate 63072 is only available for a 2" receiver with 14K weight capacity. We do have the Curt Pintle Hook with 2-5/16" Ball # C45908. This is rated for up to 20,000lbs with either the ball or pintle mount and fits 2-1/2" or 3" lunette rings. The Lock Set # C23556 will allow you to secure this to your receiver. If you prefer to have a more comfortable ride when towing you will want to use the Gen-Y Torsion...
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  • Does Curt Pintle Hook Include the Hitch Pin
    Everything you need to use the Curt Pintle Hook, part # C45910-15-20, is included except for a hitch pin. For a standard pin and cilp use part # C21500. If you prefer to lock the pintle hook to your hitch receiver use the Curt Lock Set, part # C23556, which includes 2 locking pins. One to secure the shank to your truck and one to secure the pintle hook to the shank.
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  • Height Setting Adjustment of Curt Pintle Hook with 2-5/16 Inch Ball for 2 Inch Trailer Hitch
    The Curt Pintle Hook with 2-5/16" Ball - 2" Hitches - 13,000 lbs # C45910-15-20 allows for 7 different heights within the channel. The adjustment is in 1 inch increments. This will allow for a maximum rise of 5-1/4 inches and a maximum drop of 6 inches. I recommend the Curt Lock Set for Adjustable Channel-Style Mounts # C23556 to secure both the adjustable pintle and ball but also the shank to your trailer hitch receiver.
    view full answer...
  • Replacement Adjustment Pins Needed for the Curt Pintle Hook with 2-5/16
    Yes you sure can! The replacement pins that are used to adjust the hitch ball and pintle hook on the Curt # C45910-15-20 are found on our site listed as part # C45925. If you would rather go with a locking pic set I recommend the Curt Lock Set # C23556. This will replace one of those adjustment pins and then also be used to lock the shank of this ball mount to your trailer hitch receiver.
    view full answer...
  • Locks Needed for the Curt Pintle Hook with 2-5/16" Ball # C45910-15-20
    You will want to use the Curt Lock Set # C23556 to secure the Curt Pintle Hook with 2-5/16" Ball # C45910-15-20. One pin will replace one of the pins that comes with the pintle hook and the other can be used to secure the shank in your trailer hitch. Please note that any lock can be defeated given enough time and effort/resources. This is not necessarily theft-proof but it will do a great job discouraging anyone from just walking by and taking it.
    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...
  • Will the BOLT Trailer Hitch Receiver Lock Fit a Curt Channel Style Adjustable Ballmount
    The Curt Channel Style Adjustable Ballmount # C45900 requires a span of 3-1/4" for a lock. The BOLT Trailer Hitch Receiver Lock for 2" and 2-1/2" Hitches - Codes to Toyota Key # BL7023584 will not fit the Curt ballmount. I recommend the Curt Lock Set for Adjustable Channel-Style Mounts # C23556 instead. This lock is designed for the # C45900 and the use of these pins retains the full capacity of the ball mounts. I have attached a review video of the Curt lock set for your reference.
    view full answer...


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Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Adele M
Updated by:
Adele M
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Chris R
Video Edited:
Chris R
Employee Hayden R
Installed by:
Hayden R

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