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CURT 23521 Black Trailer Tongue Coupler Lock, 1/4-Inch Pin Diameter, Up to 3/4-Inch Span

Free shipping on orders over $29.99

$18.49

$ 7 .99 $7.99

In Stock
  • DEPENDABLE SECURITY. To help protect your trailer from theft, this trailer lock is made from high-strength steel and has a padlock-style design
  • EASY TO OPERATE. This padlock-style trailer tongue lock has a heavy-duty look to deter theft, and uses a simple 1/4-turn lock activation for convenient locking and unlocking as needed
  • VERSATILE. With a 1/4-inch diameter pin, this trailer coupler lock fits latch-type couplers with a maximum span of up to 3/4 inches
  • WEATHER-RESISTANT. This trailer pin lock is protected from the elements with its black painted finish, while the coupler pin is shielded against corrosion with a durable zinc plating
  • TWO KEYS INCLUDED. For your convenience, two keys are included with this trailer tongue lock. You can keep the spare key in a discrete location for emergencies or give it to a friend for helpful access


Sometimes a safety pin and coupler latch are just not enough to keep your toys safe. While CURT safety pins and coupler latches are made to keep your coupler securely latched onto your trailer ball, they are no substitute for the locking power provided by a CURT coupler lock. CURT coupler locks are designed to add security to your trailer and towing equipment. Instead of merely retaining the coupler latch mechanism, they lock it into place and greatly deter any tampering and theft of your trailer while it is coupled to your vehicle. CURT coupler locks are key-operated and come in several different styles for you to choose from. This coupler lock features a padlock design to keep the pin well protected from tampering. It comes with a black finish and offers a pin span of 3/4" with a pin diameter of 1/4". All CURT coupler locks are made to fit latch-type couplers and include two keys. Protect your boat, your camper and even your utility trailer the right way with a CURT coupler lock.


Christina DeNoto
Reviewed in the United States on January 30, 2025
A great way to lock our trailer hitch
sk237
Reviewed in the United States on August 24, 2024
Was skeptical if it would go through my trailer, but it worked.
Liliane Dupont
Reviewed in Canada on July 24, 2024
Pour un moteur électrique
Steve Munczek
Reviewed in the United States on June 18, 2024
Extremely easy to install, barely visible, good quality and offers me peace of mind
BILL
Reviewed in Canada on March 20, 2024
YES ALL GOOD, VERY NICE PRODUCT
Schmidt
Reviewed in the United States on December 15, 2024
This thing works just fine. Protects my trailer, and dissuades the thieves.
FX4BH
Reviewed in the United States on October 24, 2024
I purchased this because it looks alot harder to cut than just a regular lockVery well made productNo worries from meKeys worked also
jordan
Reviewed in the United States on August 1, 2023
This lock works very well. I've had it for several years now. unfortunately I've forgotten it on the trailer several times and water has started to rust and damage the lock. it still works but it alittle harder to turn and the key gets stuck. Although that is my fault and not the lock. I've decided to purchase a new one. Good price and works well.
Souxinh
Reviewed in Canada on May 14, 2023
Haven't used it yet but of good quality.
TB
Reviewed in the United States on April 19, 2023
Did not know that the entire thing unscrews. I thought you turn the key and it unlocks.This lock literally unscrews itself using the key .Never seen a lock like it but it does work .Just takes a while to lock and unlock which can be annoying 🙄
Shawn M.
Reviewed in Canada on August 2, 2022
This lock works just as it is supposed to. I read some reviews saying it was still possible to cut through with a saw if someone wanted to…I think that’s true for any lock. Good purchase as far as I’m concerned. I only use this on my trailer, I never use the pin that came with it anymore.
Adrian Abreu Vazquez
Reviewed in Mexico on December 25, 2021
Buen producto y muy practico
Lab Rat
Reviewed in the United States on April 10, 2019
There have many trailers stolen from around my neighborhood and I have taken measures to keep mine. This small lock would be very difficult to break off or be cut off without a lot of trouble. That's what you want in any situation...to make them think twice and move on to an easier target.These locks are very well made and are very sturdy. Easy to put on and take off. They provide that extra level of security and peace of mind
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