10 Best Fifth Wheel Locks 2026 in the United States

The GenY Adapt 5th Wheel Lock is built to provide strong security for 5th wheel trailer connections, especially the GenY Executive 5th Wheel hitch. Made from 3/16" alloy steel with fully welded construction, it’s designed to resist common break-in attempts like bolt cutters and crowbars, making it a tough physical barrier. Its bright yellow powder-coated finish is not only weather resistant but also acts as a visible deterrent to potential thieves. The lock encloses the trailer coupler, offering a snug fit to prevent tampering.

At 11.5 x 8 x 5 inches, it’s a substantial piece of hardware, which might require some strength to handle, but this size helps ensure a secure fit. The locking mechanism works with a Trimax puck lock, known for reliability, which adds to ease of use and security. Some users might find the lock a bit heavy or bulky, but this is common with high-security trailer locks.

This product represents a strong choice for anyone looking to protect their 5th wheel trailer from theft, particularly for those who prioritize durability and clear visual signaling over lightweight convenience.

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 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.