CURT 23521 Black Trailer Tongue Coupler Lock – One-Quarter Inch Pin, Three-Quarter Inch Span, Two Keys
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Description
xProtect your trailer with the CURT 23521
Every trip, campsite, or marina parking spot comes with a risk to your trailer. The CURT 23521 Black Trailer Tongue Coupler Lock adds a strong layer of protection by transforming a standard latch-type coupler into a lockable connection. Built with high-strength steel and finished in a durable black coating, this lock is designed to withstand outdoor use and deter tampering in real-world conditions.
What makes it work
The padlock-style form creates a visible, robust barrier around the lock mechanism. A simple one-quarter-turn action allows for quick locking when you’re in a hurry and a swift unlock when you’re ready to move.
- DEPENDABLE SECURITY. High-strength steel construction paired with a padlock-style design helps deter tampering while your trailer is connected to your vehicle.
- EASY TO OPERATE. The lock activates with a quick one-quarter-turn, making locking and unlocking straightforward on the go.
- VERSATILE FIT. The one-quarter inch pin diameter fits latch-type couplers with a span up to three-quarters of an inch.
- WEATHER-RESISTANT. A black finish protects the lock from the elements, with a corrosion-resistant pin for outdoor use.
- TWO KEYS INCLUDED. Two keys offer convenience and a spare for emergencies.
Real-world use cases
Whether you’re anchoring a boat at a marina, towing a camper across town, or hauling a utility trailer for a DIY project, CURT 23521 adds a visible deterrence and a locking option that can stay in place during transit and be quick to remove at your destination.
Specs and maintenance at a glance
- Pin diameter: one-quarter inch
- Span: up to three-quarters of an inch
- Finish: black weather-resistant coating
- Includes: two keys
Care and maintenance: wipe away moisture after exposure to rain or salt water, and store spare keys in a discrete location to ensure ready access when needed.
Why choose CURT
CURT is known for practical towing accessories built to perform. This coupler lock complements CURT safety pins and latches by adding an additional locking layer, helping protect your trailer when parked or in transit. While no single lock guarantees theft prevention, the CURT 23521 is designed to make tampering more difficult and time-consuming.
FAQ
Q: What does the CURT 23521 lock protect on a trailer?
A: It deters tampering by locking latch-type trailer couplers up to a three-quarter inch span with a one-quarter inch pin.
Q: What are the key features of CURT 23521?
A: High-strength steel, padlock-style design, weather-resistant finish, one-quarter-turn operation, and two keys included.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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