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

Curt Lock Set for Adjustable Channel-Style Mounts

Part Number: C23556
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$73.76
Retail:$111.95
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Trailer Hitch Lock
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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.
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  • Reviews (79)
  • Q & A (0)
  • Videos (2)
  • Photos

CURT Trailer Hitch Lock - C23556

  • Fits 2 Inch Hitch
  • Standard Pin Lock
  • Keyed Unique
  • 3-1/4 Inch Span
  • 4-1/4 Inch Span
  • CURT
  • 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 Ballmounts for 2" and 2-1/2" hitch receivers (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 A Closer Look at the Curt Lock Set for Adjustable Channel-Style Mounts

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. profile picture

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 profile picture

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:

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:

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



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 profile picture

James

12/26/2022

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



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:

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 profile picture

Wes

1/28/2021

Great lock and we have had no issues



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:

Matched the description. Easy to use!



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 profile picture

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:

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:

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.

Sierra K. profile picture
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:

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:

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 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:

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 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:

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.



by:

They work but the locks are a little loose and I think could be knocked off without a lot of effort.


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Show More Reviews

See what our Experts say about this CURT Trailer Hitch Lock

  • Locking Hitch Pin Kit Recommendation for 15K Curt Adjustable 2-Ball Mount
    I recommend using the Curt Lock Set # C23556 for your Curt Adjustable 2-Ball Mount # C99NR. This comes with a lock for the hitch receiver and one for the ball mount platform. Even though your platform uses 2 pins, only 1 locking pin is needed to secure everything to your vehicle.
    view full answer...
  • Will Curt Lock Set Fit Curt Adjustable 2-Ball Mount for 2" and 2-1/2" Hitches
    Yes, the Curt Lock Set # C23556 will work with both the # C45900 and # C45902 meaning the 2-1/2" hitch won't be a problem. The pair of locks comes keyed alike but there is no option to match the keys between the sets of locks.
    view full answer...
  • Replacement Channel Mount Ball Platform for 20K 3 Inch Wide Adjustable Curt Shank
    The internal channel width of the Replacement Shank for Curt Adjustable 2-Ball Mount # C45917 is 3" while the Replacement Ball Platform # C28KR you're looking at has a 2-3/4" width and is for the Curt Rebellion XD rated only for 15K as opposed to the 20K rating for your shank. Since there will be a 1/4" difference I recommend going with the Curt Pintle Hook # C45922 instead which has the higher rating to match your shank plus it comes with a 2-5/16" hitch ball that can be swapped out for...
    view full answer...
  • Will Curt Adjustable 2-Ball Mount Work With 2024 Toyota 4Runner SR5 Towing Small RV
    Hi David; more than likely the answer is yes. The Curt # C99NR will be able to handle a small RV and has a 4-1/2" max rise and 5-1/2" max drop. However, it would be a good idea to measure and make sure the rise/drop will work well for the trailer. You can use the formula Hitch Height (A) - Coupler Height (B) = Rise/Drop (C). I have included a link below which explains exactly how to measure to find the rise/drop you need. If it falls between the max rise/drop of the ball mount then you're...
    view full answer...
  • 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.
    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...
  • Recommended Locking Hitch Pin Set that Resists Corrosion and Rust
    I grew up on a farm, I totally get your dilemma. You need a set of stainless steel locking hitch pins. The best option for a channel style ball mount is going to be the InfiniteRule Locking Pins item # 34061674-D. This heavy-duty locking pin set has a 42,000 lbs shear strength and can be controlled by a single key. It is made of a rust and corrosion resistant stainless steel and has a built in o-ring that keeps moisture out so the internal functions of the lock don't seize up. This lock...
    view full answer...
  • 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.
    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...
  • Recommended Locking Hitch Pins For The Blue Ox Adjustable 2-Ball Mount # BLU75XR
    I spoke with Blue Ox who stated that the the inside channel of the Blue Ox Adjustable 2-Ball Mount # BLU75XR is approximately 2" wide. That being said, when you look at the pictures it's clearly about a 1/2" - 1" wider than the 2" shank it's attached to so you'd want to go with a hitch pin lock like the Curt Lock Set for Adjustable Channel-Style Mounts # C23556, which has 5/8" diameter pins with a 3-1/4" or 4-1/4" span. This will allow you to secure both the shank to the trailer hitch of...
    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...
  • Locking Hitch Pin Kit Recommendation for a Blue Ox Adjustable 2-Ball Mount
    To lock the Blue Ox Adjustable 2-Ball Mount # BLU75XR to your trailer hitch and the ball mount to the shank section I recommend picking up the Curt Lock Set # C23556. This includes a standard locking hitch pin as well as one that's a bit longer. This will give you enough security to deter any opportunistic thieves. Attached are some review videos for you to check out!
    view full answer...
  • Measurement Of The Adjustment Holes On Demco Lunette Ring and Compatibility With Curt Channel Mount
    Yes, the Demco Lunette Ring - Adjustable Channel Mount - 3" Diameter - Black - 25,000 lbs, # DM09557-81 should be compatible with the Channel Style Adjustable Ballmount - 2" & 2-5/16" Balls - 14,000 lbs, # C45900 but you will be limited by the 14,000 lb capacity of the mount for towing. The Demco lunette ring has 2 inch on center holes and the Curt mount has 1 inch on center adjustability. If you want the lockable pins, I recommend the Curt Lock Set for Adjustable Channel-Style Mounts...
    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...
  • Recommended Trailer Hitch and Ball Mount for 2018 Ford F-250
    For your 2018 Ford F-250, I recommend the B&W Heavy-Duty Trailer Hitch Receiver - Custom Fit - Class V - 2" # BWHDRH25602. This hitch is rated for 1,600 lbs tongue weight and 16,000 lbs towing. It is a 2 inch receiver opening, so it will be compatible with many accessories as well as ball mounts. This is rated for the same capacities when using weight distribution which I do recommend if you are towing that much weight. For your ball mount, I recommend the Curt Channel Style Adjustable...
    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...
  • 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...
  • Is There a Locking Ball Mount Rated for Over 10,000 lbs?
    The only B&W Tow & Stow ball mounts we offer that have a towing capacity over 10,000 lbs and fit in a 2" hitch use a pintle hook, like # BWTS10055. There are adjustable ball mounts from other manufacturers that fit in a 2" hitch and can give you the capacity you need. The Andersen EZ Heavy Duty Adjustable Hitch # AM3298 is one of those options as it has a 14,000 lb capacity with the 2-5/16" ball and offers a maximum rise of or drop of 8". I've added links to video reviews of these ball...
    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...
  • 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.
    view full answer...
  • Locking Pin Compatible with BWGNC4250 Gooseneck Coupler
    The B&W Defender Locking Gooseneck Coupler Inner Tube - Round - 2-5/16" Ball - 25,000 lbs # BWGNC4250 would require an incredible lifting height of the trailer steadily straight up to release a trailer when locked at the coupler to the hitch ball. That is the only reason it doesn't come with the locking pin you referenced. The InfiniteRule Hitch Lock for Gen-Y Gooseneck Coupler w/ 4" Round Tube - Stainless Steel # 34065041 would be a great fit. It is a 3/4 inch diameter lock that has...
    view full answer...
  • 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...
  • Increments of Drop for Curt Channel Style Adjustable Ball Mount
    The Curt Channel Style Adjustable Ball Mount # C45901 adjusts in 1 inch increments, with it's maximum drop being 6-3/4 inches, and you can then go to 5-3/4 inches, 4-3/4 inches, or 3-3/4 inches depending on what you need. This ball mount comes with a pin and clip but you can lock the mount with the Curt Lock Set for Adjustable Channel-Style Mounts # C23556. For a hitch ball, the corrects fits are 1-7/8" Hitch Ball # C40002 and 2" Hitch Ball # 63845. I have added a link to a video review...
    view full answer...


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