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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: $74.51
You Save: 33%
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
  • 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   (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:

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



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:

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:

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:

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:

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 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:

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:

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



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:

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

  • 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...
  • 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 Trailer Wiring Harness for 2000 GMC Sierra 1500
    For your 2000 GMC Sierra 1500 there is not a connection to factory wiring for the connector you mentioned. My recommendation is to use the Vehicle Wiring Harness Kit with 4 Pole Trailer Connector (Includes Install Kit) # C59496 that is confirmed to work with your truck. I've attached a video of an install on a vehicle just as a reference. This harness will protect your factory wiring from overload and create an easy connection using the quick-splice connectors. I've attached an article...
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  • 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...
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  • 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.
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  • 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...
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  • Recommended Trailer Hitch Receiver For 2017 Honda CR-V
    We do have a trailer hitch receiver for your 2017 Honda CR-V. I'd recommend the Draw-Tite Max-Frame Trailer Hitch Receiver Class III -2 inch # 76128. This hitch has the e-coat base and powder coat finish for excellent rust protection. If you will be towing with this trailer hitch receiver, you'll need a few other items, beginning with a trailer wiring harness, part # 118741. For a ball mount, I recommend the # 2753 ball mount and # 19260 for a 1-7/8 inch or # 63845 for a 2 inch trailer...
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  • Recommended Trailer Hitch Receiver For 1998 Chevy K3500
    For a 1998 Chevrolet K Series 3500 Pickup, I recommend the Draw-Tite Ultra Frame Trailer Hitch Receiver Class IV - 2" # 41901. This is an extremely sturdy hitch that is easy to install. It will fit a standard or step bumper. For a roll-pan bumper, use # 41522. For your wiring, I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118315 to get a 4 way connection. Then you will want to add the # ETBC7 to get your 7 way connection along with the circuit breakers,...
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  • 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...
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  • 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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  • 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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  • 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...
  • 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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  • 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...
  • 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...
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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
  • Recommended Trailer Hitch Receiver For 1993 Ford Van
    The word bus may have thrown them. The 1993 Ford Van Draw-Tite Ultra Frame Trailer Hitch Receiver Class IV - 2" # 41906 is a fit. We have pictures of this hitch on a 16 passenger van of other year models. You will also want the 1993 Ford Van T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118345. This will connect to your factory vehicle wiring behind the tail lights. This ModuLite connects to your battery directly to protect your factory system from overload. ...
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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)
    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 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...
  • Recommendations for Locking Hitch Pin and Locking Adjustable Ball Mount Pin Keyed Alike
    It sounds like you are talking about a lock set that includes one hitch lock and a second lock for an adjustable ball mount. We have locking pin set # FA86-00-3685 that could potentially work for you. In this set the 5/8 inch diameter hitch lock has a inside pin length of 3-5/8 inches. The adjustment pin is also 5/8 inch and has a length of 4-1/2 inches. We also have lock set # AM3492. It also includes two 5/8 inch diameter locking pins. The inside span of the hitch lock is 3-5/16 inches...
    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...
  • 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...
  • 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...


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Info for this part was:

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Employee Adele M
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Employee Isabelle B
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