10 Best Fifth Wheel Locks 2026 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 BELA DOMO Fifth Wheel Lock Adjustment Tool is a sturdy iron tool designed specifically for professionals or truck owners who need to inspect and adjust the locking mechanism on fifth wheel couplings. Its iron build ensures durability, important for withstanding the tough conditions often found in commercial truck maintenance. Though the tool itself does not lock, it helps verify the lock’s performance by measuring the gap between lock jaws and the kingpin to ensure the connection is secure and within manufacturer tolerances. This feature is essential in preventing dangerous slack that could cause trailer disconnects or excessive wear.

At 27 x 9.5 x 5.5 inches, the tool is reasonably sized for handling and fits a range of fifth wheel models, but users should verify compatibility with their specific equipment. The tool is simple to use with a push-button mechanism for locking and unlocking during adjustments, which makes routine maintenance more efficient. However, it lacks weather resistance features, so it should be stored properly to avoid rust or damage over time. This product is not smart home compatible, which is typical for such specialized mechanical tools.

This adjustment tool is well-suited for commercial truck and trailer technicians focused on maintaining optimal fifth wheel lock performance, though casual or infrequent users might find it specialized. Regular use can reduce costly roadside breakdowns, making it a practical investment for safety and maintenance.