10 Best Fifth Wheel Locks 2025 in the United States

The Andersen Ultimate 5th Wheel Connection Lock is built with ultra-high security in mind, featuring a proprietary design that fits all versions of the Andersen Ultimate 5th Wheel connection. Its heavy-duty construction utilizes 3/16-inch fully welded cold rolled steel, making it highly resistant to bolt cutters and crowbars. The bright yellow powder coat finish serves as a deterrent to potential thieves.

The Trimax puck lock included is a hidden-shackle padlock designed to prevent theft, emphasizing the lock's security aspect. This product is particularly suitable for users looking to secure their fifth-wheel trailer with a robust and visible lock mechanism.

Its dimensions of 11.5 x 4.5 x 7 inches ensure compatibility with most fifth-wheel connections, and the steel construction guarantees durability and strength. The included components, such as the Trimax puck lock and two keys, add convenience and value to the purchase. If you need a sturdy and secure lock for your Andersen Ultimate 5th Wheel connection and prioritize security above all, this product is a worthy consideration.

The Andersen Ultimate 5th Wheel Connection Lock is designed for high security with its robust construction. Made from fully welded cold rolled steel, this lock is both bolt cutter and crowbar proof, ensuring it stands up to potential theft attempts. Its bright yellow powder coat finish not only provides a layer of weather resistance but also acts as a deterrent for thieves.

The lock fits all versions of the Andersen Ultimate 5th Wheel connection, including the new funnel and eye bolt applications, making it versatile for different setups. The use of a hasp that accepts most 'puck' style locks (though not included) adds an extra layer of security. However, at 18 pounds, it is relatively heavy, which might make it less portable.

Additionally, while the lock is highly secure, some users might find the need for a separate puck lock inconvenient. The bright yellow finish is excellent for visibility but may not appeal to those looking for a more discreet option. This lock is a solid choice for those needing heavy-duty protection and are willing to manage its weight and the requirement for an additional puck lock.

The Proven Industries Model PL-5 Fifth-Wheel Kingpin Lock is designed to provide robust security for industrial and heavy-duty fifth wheels, including 18-wheelers and RVs. Made in the USA, it boasts a solid-steel TIG-welded collar and a 303 stainless-steel pin, making it highly resistant to power tools and bolt cutters.

Its unique key design prevents lock picking and unauthorized key duplication, enhancing security further. The lock is versatile, fitting various fifth-wheel trailers and accommodating lube plates, which adds to its universal appeal.

Some might find its weight (4 pounds) a bit cumbersome. Additionally, the product does not mention any specific weather-resistant features, which could be a concern for users in harsh climates. Despite these minor drawbacks, if you need a reliable and sturdy lock to protect your trailer or RV from theft, this model is worth considering.