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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Shipping Weight: 0.76 lbs

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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. Call 800-298-8924 to order Curt hitch locks part number C23517 or order online at Free expert support on all Curt products. Guaranteed Lowest Price and Fastest Shipping for Curt Trailer Hitch Receiver Lock - 1-1/4" and 2" Hitches - Stainless Steel. Hitch Locks reviews from real customers.
  • All Info
  • Reviews (7)
  • Q & A (9)
  • Videos (2)
  • Photos
  • Why etrailer?

Curt Hitch Locks - C23517

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

California residents: click here

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

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Curt Hitch Locks - Standard Pin Lock - C23517 Review

Today we're going to be taking a look at the Curt Hitch Lock for 1 and 1/25 and 2 inch hitches. Now this hitch lock offers maximum security for accessories mounted in your trailer hitch. It is a very versatile lock which is a great feature of the unit, makes it very unique. It actually comes with this adapter sleeve, which I'll show you here in a moment. This converts the pin size from a 1/2 inch diameter pin to a 5/8 inch diameter pin. This allows you to use this hitch lock in an 1.25 by 1.25 receiver tube and a 2 inch by 2 inch receiver tube.

Really great design. Nice easy grip design on the unit. Makes it very functional, very easy to handle. The units constructed of a stainless steel construction. It's very strong and durable. It's not going to rust or corrode, it's going to look good for a long time.

Very easy to operate, quarter turn design when it comes to the lock. Place the key in there, quarter turn design, disengages the lock from the pin then you can remove the sleeve. The unit's going to feature a nice, watertight dust cap that prevents internal corrosion. It's also going to come with 2 keys. Each key has an easy grip design as well, they are keyed alike, so either one of the keys will work for the unit. Now for our demonstration today, I am going to need a 5/8 inch diameter pin, so I put that sleeve on there.

I do want to mention a few measurements for you real quick before I show you how this would install. We're going to go over the usable pin length. That's measuring the span basically, from this area here to this point right here. This is going to give us a usable pin length of 2 and 13/16 of an inch. Overall length form edge to edge, measures about 5 1/25 inches. We're ready to use it, all we've got to do is remove the lock from the pin just like that.

We've got a ball mount placed in there, so what I'll do is take my pin, here to line up my pin holes. Place it through the pin holes of the hitch and of the accessory, out the other side. Place my lock on, rotate the key to lock it, close up the dust cap. That's all there is to it. That's going to do it for today's look at the Curt Hitch Lock for 1 and 1/25 and 2 inch hitches.

Customer Reviews

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

Average Customer Rating:  4.9 out of 5 stars   (7 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

Works as intended. 358569

- C23517

Excellent product and high quality. Super fast shipment and excellent help. 511663

- 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 714648

- 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. 697718

- 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. 587808

- 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. 480958

- C23517

Super fast delivery 452941


Ask the Experts about this Curt Hitch Locks

Do you have a question about this Hitch Lock?

  • 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...
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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 II hitch # C12176. And you're right that the Draw-Tite hitch # 36643 does not fit the hybrid. Curt hitch # C12176 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...
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  • 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...
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  • 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...
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  • 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...

  • 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...

  • 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...

  • 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...

  • 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...

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Info for this part was:

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

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