10 Best Fifth Wheel Locks 2026 in the United States

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.

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 AMPLock U-LPCVR Heavy Duty 5th Wheel Lock is a robust security solution for travel trailers. It's constructed from high-quality stainless steel and cast iron, making it extremely durable and resistant to tampering. The lock features a patented cylinder lock and a unique conical design that prevents traction with chains and modified hitches, enhancing security when your trailer is unhitched.

Weighing in at 10 pounds, it acts as a significant deterrent to theft through cutting or other tampering methods. The lock is designed for easy use with a push-and-lock system that simplifies installation and removal, which is handy for frequent use. The product dimensions (7 x 6 x 8.5 inches) suggest it should be compatible with most fifth wheel setups, although checking specific compatibility is recommended.

One drawback could be its weight, which might make it cumbersome for some users to handle. Additionally, while it is highly resistant and durable, there's no specific mention of weather resistance, which might be a consideration for outdoor storage. With a strong customer rating of 4.6 out of 5 stars, it is well-regarded for its reliability and security. This lock is particularly suitable for those needing heavy-duty protection for commercial trailers and semi-trailers.