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Curt Trailer Hitch Receiver Lock - 1-1/4" and 2" Hitches - Stainless Steel

Curt Trailer Hitch Receiver Lock - 1-1/4" and 2" Hitches - Stainless Steel

Item # C23517
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Trailer Hitch Lock
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Shipping Weight: 0.72 lbs
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Trailer Hitch Lock C23517 - Keyed Unique - Curt
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Product Images

In Use/Installed

Customer Photos

This stainless steel lock is perfect for keeping any hitch accessory or ball mount locked securely to your 1-1/4" x 1-1/4" or 2" x 2" hitch. Tube-style-key pin lock with 2-13/16" span resists picking, providing peace of mind. Lowest Prices for the best trailer hitch lock from Curt. Curt Trailer Hitch Receiver Lock - 1-1/4" and 2" Hitches - Stainless Steel part number C23517 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (14)
  • Q & A (16)
  • Photos
  • Why etrailer?

Curt Trailer Hitch Lock - C23517

  • Fits 1-1/4 Inch Hitch
  • Fits 2 Inch Hitch
  • Fits 1-1/4 and 2 Inch Hitch
  • Curt
  • Standard Pin Lock
  • Keyed Unique
  • 2-13/16 Inch Span
  • Stainless Steel
  • Flush Pin

This stainless steel lock is perfect for keeping any hitch accessory or ball mount locked securely to your 1-1/4" x 1-1/4" or 2" x 2" hitch. Tube-style-key pin lock with 2-13/16" span resists picking, providing peace of mind.


  • Flush-style trailer hitch receiver lock is used in place of standard pin and clip to prevent theft of ball mount or hitch-mounted accessory
    • Secure your bike rack, cargo carrier, hitch cover and more to your trailer hitch
  • Tube key lock cylinder provides better security than standard key mechanisms
    • Harder to pick and resists drilling
    • More difficult to duplicate keys
  • Weather-resistant dust cap keeps cylinder free from water and debris
  • Stainless steel construction provides superior durability and corrosion resistance
  • 2 Keyed-alike keys included


  • Application: 1-1/4" x 1-1/4" or 2" x 2" trailer hitch receivers
  • Pin diameter: 1/2"
    • Adapter sleeve diameter: 5/8"
  • Inside pin length (span): 2-13/16"
  • Overall length: 5-1/4"

23517 Curt Hitch Lock - 1-1/4" and 2" Hitches - Stainless Steel

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Customer Reviews

Curt Trailer Hitch Receiver Lock - 1-1/4" and 2" Hitches - Stainless Steel - C23517

Average Customer Rating:  4.8 out of 5 stars   (14 Customer Reviews)

This stainless steel lock is perfect for keeping any hitch accessory or ball mount locked securely to your 1-1/4" x 1-1/4" or 2" x 2" hitch. Tube-style-key pin lock with 2-13/16" span resists picking, providing peace of mind.

- C23517

The lock is high quality and I like the fact that it is stainless steel. Works fine with the bike rack (1.5 inch receiver pin easily goes through the rack on a 2 inch receiver). Saves a lot of time over having to bolt things together every time I want to take the bike's out.

- C23517

Didn’t fit the hole for the bike rack we purchased. Seems well constructed.

- C23517

this was a replacement for a non locking pin for my receiver on my gold wing motorcycle. Works well, E-trailer is easy to deal with and their support staff are quite product knowledgeable. I have recommended E-trailer to anyone needing towing supplies.

- C23517

Great security for traveling.

- C23517

- C23517

- C23517

Excellent service. I will use etrailer again !

- C23517

I am very impressed with etrailer's customer service. They are very helpful and professional and go the extra mile. The bonus is they really deliver on their promise, their products are great. Everything I have purchased from them is better than expected.

- C23517

- C23517

great unit--works great!

- C23517

Excellent product and high quality. Super fast shipment and excellent help.

- C23517

everything with the order came through in great shape! now we just have to put it the truck. will order again with confidence. thank you

- C23517

Works as intended.

- C23517

Super fast delivery


Ask the Experts about this Curt Trailer Hitch Lock

  • Does the Curt Hitch Lock C23517 Have a Weight Capacity
    The Curt Hitch Lock part # C23517 will work just fine for a 10,000 lb trailer however, I do not have a specific tongue weight nor gross trailer weight rating because this is just not something the manufacturer test for. The reason for this is because it is not needed. The 1/2" diameter pin or 5/8" when using the sleeve will have a shear strength rating that far exceeds what you will be able to pull with the vehicle. Nearly all trailer hitch pins do not include a specific weight capacity.
    view full answer...
  • Locking Hitch Pin for Thule Vertex 4 Bike Rack # TH9029XT
    If you would like to use a locking hitch pin with your (discontinued) Thule Vertex 4 Bike Rack TH9029XT, the only option available is the Thule Snug Tite Hitch Lock and Anti-Rattle Device # THSTL2. I contacted Thule to see if the Curt Hitch Lock # C23517 will fit and my contact said that the hitch pin hole was specially made to fit with the Snug Tite option. This is a very common situation; many bike rack companies use specific locks which prevent people from using generic products.
    view full answer...
  • Will the Curt Trailer Hitch Receiver Lock Fit a Pro-Series 63134 Q-Slot 2 Black 2-Bike Rack
    The Pro-Series 63134 Q-Slot 2 Black 2-Bike Hitch Mounted Bike Carrier looks like it uses an adapter for 2" hitches. As such, I cannot guarantee if the Curt Trailer Hitch Receiver Lock, part # C23517, will work with it. However, I can tell you that this lock's inside pin length (span) is 2-13/16", and the pin diameter is 1/2" (5/8" with the adapter sleeve). If those measurements are compatible with your bike rack, then this will work. It's likely that it will, but you should measure...
    view full answer...
  • Trailer Wiring Harness That Fits 2021 Kia Seltos
    The trailer wiring harness that fits your 2021 Kia Seltos is the Curt T-Connector Vehicle Wiring Harness # C89KR. Along with the wiring harness, the trailer hitch that fits your '21 Seltos is the Curt Trailer Hitch Receiver # C65FR. It sounds like you are planning to do some towing so you will also need the Curt Class II Drawbar # C45521 with Trailer Hitch Receiver Lock # C23517 or Pin and Clip # F-4 to secure it to your hitch. For a hitch ball you will need either 1-7/8" Hitch Ball...
    view full answer...
  • Trailer Hitch Receiver Lock for 1-1/4 Inch Hitch on 2015 Subaru Impreza
    There is a trailer hitch receiver lock that works with the 1-1/4 inch receiver of the Curt Trailer Hitch Receiver # C11286 that fits your 2015 Subaru Impreza, though the lock you mentioned is only a fit for 2 inch hitch receivers. Instead, for a similar lock I recommend the Curt Trailer Hitch Receiver Lock # C23517. This is similar to the lock you mentioned but is compatible with smaller hitch receivers; it is made of stainless steel so it is highly resistant to any corrosion and...
    view full answer...
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  • Hitch and Cargo Carrier for 2018 Toyota Camry Hybrid
    We do have a hitch to fit your 2018 Toyota Camry Hybrid, the 1-1/4-inch Curt Class I hitch # C11576. And you're right that the Draw-Tite hitch # 36643 does not fit the hybrid. Curt hitch # C11576 installs without drilling using the included hardware pack. The instructions are linked for reference along with a helpful article with tips for an easier install. For a wiring harness I recommend kit # 118763 for its simple plug-in installation and because Tekonsha products are proven to be...
    view full answer...
  • Recommended USA-Made Hitch and Wiring Harness for 2018 Volkswagen Golf SportWagen
    We offer several options in a light-duty Class I hitch for your VW Golf SportWagen that will let you pull your small utility trailer. All of them happen to have the same capacities and will install in the same way but one offers you a chance to install a USA-made hitch made from recycled materials, the EcoHitch # 306-X7315. I linked a photo that shows the clean appearance of the EcoHitch after installed on a Golf and the instructions to install it are included too. You do not have to...
    view full answer...
    Image 1 for
  • Trailer Hitch and Towing Capacity for 2018 Buick LaCrosse
    For your 2018 Buick Lacrosse we do offer hitches and I recommend the USA-made Curt hitch # C12166 which is a 1-1/4-inch Class II type rated for up to 350-lbs of tongue weight and 3500-lbs of towing weight. I recommend this one over the Draw-Tite # 36652 that you referenced because of its higher tongue weight rating of 350-lbs. Your car itself could have different capacities so I checked the online owner's manual to confirm the towing capacity determined by GM. The 2018 Buick LaCrosse...
    view full answer...
  • Recommended Base Plate and Receiver Locks with Unique Keys
    I have a solution for you and I was a little bit surprised to hear this, so I reached out for confirmation from Blue Ox and they confirmed that you are correct on this. All of their locks in the Blue Ox Base-plate and Receiver Lock Kit # BX88177 have the exact same locks, so anybody with this product's keys would be able to unlock these locks. While this is highly unlikely that someone would be carrying around the same keys to your locks, I can understand this concern. With that being...
    view full answer...
  • How to Lock Receiver Hitch to Vehicle
    Are you speaking of a locking hitch pin to prevent the ball mount or hitch mounted accessory from being stolen? If so, I'd just use a locking hitch pin like # C23517 which is compatible with 1-1/4 and 2 inch receivers. If you're concerned about somebody actually unbolting and making off with the hitch, we don't have a lock that would secure the hitch to the vehicle, but you could have a welder tack the mounting bolts in place so they'd be pretty difficult to remove.
    view full answer...
  • Recommended Draw Bar for Curt Class I Hitch on a 2019 Mitsubishi Mirage G4
    The draw bar that is recommended to be used with the Curt Trailer Hitch Receiver # C11449 on your 2019 Mitsubishi Mirage G4 is the Curt # C45521 which has a 2-5/8" Rise/3-1/4" Drop. To secure this to the hitch receiver you need a pin & clip # F-4 or locking hitch pin # C23517 and then you also need a hitch ball like the 1-7/8" # A-80 or 2" A-82. A complete towing setup also requires wiring to activate the trailers lights. For your application I recommend the Tekonsha ZCI # 119250KIT...
    view full answer...
  • Trailer Hitch and Wiring for 2017 Ford Focus ST Hatchback
    Curt 1-1/4-inch Class I hitch # C11431 is a confirmed fit for your 2017 Ford Focus ST Hatchback and the written instructions and a help article are linked to assist you in mounting it on your Focus. However, the online owner's manual I reviewed indicates that this "vehicle is not approved for trailer towing. Never tow a trailer with your vehicle". Your printed manual may differ so I recommend checking it. Sometimes the generalized online versions of manuals have different information. If...
    view full answer...
  • Trailer Wiring Harness for 2011 BMW 328xi
    The wiring harness that fits your 2011 BMW 328xi is a universal hardwire, the Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit # 119250KIT, so there is no specific diagram available (just the universal one from the instructions which I added); however, I have linked the directions as well as a video of this kit being installed on a 3 Series which you can use for reference. This kit does include a circuit tester to ensure you find the right functions of your lights,...
    view full answer...
    Image 1 for
  • Hitch & Wiring for 2018 BMW 5 Series xDrive for Towing Utility Trailer
    We do offer a hitch for your 2018 BMW 530i with the xDrive system, Curt's 1-1/4-inch Class I model # C11478 with which you can use ball mount # C45521. You will need to add the hitch ball, one of the size required by the coupler on your trailer. Check the coupler for a sticker or stamping in the housing that indicates the required ball size, either 2-inch # A-82 or 1-7/8-inch # A-80. You will also need either a hitch pin # F-4 or a hitch lock # C23517 to secure the ball mount in the hitch. If...
    view full answer...
  • Recommended Hitch Lock for Curt Drawbar on 2015 Ford Mustang
    To secure and lock the Curt Class II Drawbar # C45519 referenced in your question to your hitch receiver, I recommend the Curt Hitch Lock # C23517. This is a really nice, stainless steel lock that is compatible with this drawbar and your hitch, and will do a great job of helping to deter theft of your valuables. It features an easy-to-operate quarter-turn lock activation and a watertight dust cap that will prevent internal corrosion. 2 keys are included with the product. I have attached...
    view full answer...
  • Is Curt 2" Hitch Ball Compatible With Class II Drawbar 45521
    I am happy to confirm that yes, you can use the Curt Chrome 2" Hitch Ball # C40018 you asked about with the Curt Class II Drawbar # C45521. These two parts are completely compatible, and also keep in mind you will need either a pin and clip or hitch lock to secure the ball mount to your hitch receiver. For that you will need either Curt Class I and II Pin and Clip # F-4 or Curt Trailer Hitch Receiver Lock # C23517. I have added links to some video reviews for you to check out as well.
    view full answer...

Do you have a question about this Trailer Hitch Lock?

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Info for this part was:

Employee Zack K
Video Edited:
Zack K
Employee Cole B
Installed by:
Cole B
Employee Sarah W
Written by:
Sarah W
Employee Jonathan Y
Video by:
Jonathan Y
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B

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