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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: $72.11
You Save: 36%
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 (78)
  • Q & A (0)
  • Videos (2)
  • Photos

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, 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   (78 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:

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:

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:

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:

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:

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:

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:

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



by:

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



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:

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:

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:

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:

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:

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

  • 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...
  • 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 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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  • Recommended Trailer Hitch Compatible With 1992 GMC 1500 4WD with Standard Bumper
    The Curt Trailer Hitch Receiver # C13042 is a confirmed fit for your 1992 GMC 1500 4WD truck. There is no drilling needed for this hitch installation, but you will need to lower your spare tire for installation. If you don't already have trailer wiring, I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118315 which is confirmed to fit your truck. This custom-fit T-One connector plugs into your GMC C/K Series Pickup's wiring harness, which is located beneath...
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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 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...
  • 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...
  • 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 Needed for the Curt Multi-Ball Adjustable Ball Mount # D900
    The only solution that Curt offers if part # C23556 which only comes with 2 locks that are keyed alike. For your Curt Multi-Ball Adjustable Ball Mount # D900 you will want to use the Trailer Hitch Receiver Lock - Extra Long # e98881 to lock adjustable mount and then part # e98880 for the shanks. Since these are both DeadBolt products if you choose the "Keyed Alike" option when placing your order you will get all of them keyed alike when you place them on the same order.
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  • Draw-Tite Trailer Hitch Receiver # 41944 Compatibility with 2007 Chevy Silverado 2500 HD New Body
    The Draw-Tite Ultra Frame Trailer Hitch Receiver w/ Cast Center - Custom Fit - Class V - 2" # 41944 is a confirmed fit for your 2007 Chevy Silverado 2500HD with the mid-year new body style. This particular hitch is also a confirmed fit for the older classic body style which is why you see the video of the 2006 model. If you look at the installation details you will see that the brace or brackets are only existing on 2001 to 2007 models (so classic style), however this hitch will still...
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  • Recommended Hitch Lock and Coupler Lock Incorporating Safety Chains
    I am not aware of any chain lock. We do have some ball mounts like the B&W Tow & Stow 3-Ball Mount - 2" Hitch - 5" Drop, 5-1/2" Rise - 10K - Black # BWTS10048B which when using a locking hitch pin like # 63232 will secure the shank and ball to the hitch receiver. The Curt Channel Style # C45900 will also secure the ball and mount using # C23556. If you want to secure a coupler to the ball you can use # BD580403. If you really want to secure your chains, you can use a cable lock like...
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  • Recommended Trailer Hitch Receiver And Wiring For 1999 Ford E-450
    For your 1999 Ford E-450, I recommend the Draw-Tite Ultra Frame Trailer Hitch Receiver - Custom Fit - Class IV - 2" # 41906. This will give you a 2 inch receiver and is confirmed to fit all models for that year. If you don't have the factory 7 way, I recommend you start with the Tekonsha T-One # 118344 that connects behind your tail lights to your factory wiring. You will then use the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires...
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  • 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...
  • Will Demco Adjustable Clevis Work With Curt Replacement Shank
    The Demco Adjustable Channel mount Clevis, part # DM12676-30 is compatible with the Curt One Mount Replacement Channel Mount Shank, part # C45910. The inside dimension of the # C45910 channel mount is a little larger than 3 inches and the holes are 2 inches apart. The holes on the # DM12676-30 Demco Clevis are 1 inch apart so the channel mount will work just fine with the Clevis. If you need locking hitch pins for the mount I recommend part # C23556. These locks measure 6-1/4 inches...
    view full answer...
    Image 1 for Image 2 for
  • 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)
    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...
  • Will InfiniteRule Hitch Lock Fit Curt Channel Style Adjustable Ballmount
    I'm not exactly sure which Curt you're talking about, but I assume it is one like the # C45900 with the 3" wide channel. A 3-7/8" span on the # 34061074-D should fit but just barely, it will be tight. A better option would be the Andersen Rapid Hitch # AM3492 or Curt # C23556. The Curt lock has a 4-1/4" span to fit that channel and comes with a locking hitch pin with a 3-1/4" span as well for added security. The Andersen also has a 4-1/4" span for the locking pin and comes with a locking...
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  • 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.
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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...
    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...
  • Is Locking Pin Kit for Curt Ball Mounts C45902 and C45900 The Same
    The channel dimensions are the same between the part # C45900 and # C45902 so the locking pins that fit one would also fit the other. For that you would be referring to part # C23556.
    view full answer...
  • What Trimming is Required to Add a Trailer Hitch to My 2017 BMW X3?
    To install the Curt Class III Trailer Hitch # C13316, on your 2017 BMW X3 there is underbody trimming required, but not fascia. There won't be anything trimmed that will be visible from the back of your vehicle. Installation does require temporary removal of bumper during installation, but there is no drilling required. I've attached a video of the installation on an older model X3 for you. The installation hasn't changed, nor has the hitch receiver for your 2017 model with M Sport package....
    view full answer...
    Image 1 for
  • Comparing Flash Solid Steel HD Adjustable 2-Ball Mount and Curt Channel Adjustable 2-Ball Mount
    The weight of the Flash Solid Steel HD Adjustable 2-Ball Mount # FA49-00-5625 that you referenced is 37 lbs, and the weight of the Curt # C45902 is 36 lbs. So in that regard they are essentially the same. They really are quite a bit alike in most ways. Same capacity at 20,000 lbs, both fit 2-1/2 inch hitches, both can do same amount of drop at 6 inches, both are highly reviewed by our customers, and both have very similar prices. I'd say the edge goes to the Curt though since it has two...
    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...


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Info for this part was:

Employee Michael H
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Employee Adam R
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Employee Adele M
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Employee Wilson B
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