10 Best Fifth Wheel Locks 2026 in the United States

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.

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 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.