ISO Twistlock

What is an ISO Twistlock?

An ISO twistlock, also known as a locking mechanism, is an essential component in the world of shipping containers. This mechanism is used to securely fasten containers together. The mechanism gets its name from the International Organization for Standardization (ISO), which has established specifications to ensure that containers are universal worldwide. The ISO twistlock plays a crucial role in securely fastening containers to sea container corners, allowing them to be stacked securely and stably on ships and preventing them from shifting during transport. The ISO twist lock also makes it possible to lock heavy-duty wheels under a shipping container.

Types of Twist Locks

There are different types of twist locks designed for specific applications and conditions. These vary in size, material, and mechanism. Some twist locks are made of aluminum to provide a form of corrosion resistance, while cast iron twist locks are robust. Twist locks have different operating mechanisms, such as manual twist knobs or automatic locking systems, which offer convenience and efficiency when loading and unloading containers. For our container wheels, a standard single-sided twist lock is welded to the top plate of the turntable.

ISO twistlocks are not only used to securely fasten containers on seagoing vessels, but are also used on other means of transport, such as trains and trucks. In addition, they are used in the logistics sector for the efficient stacking of containers in storage facilities. An ISO twistlock is a locking mechanism that fits into a corner piece that complies with the standardised 1161 ISO standard. The corner pieces can be placed under transport platforms, chalets or other objects, for example. The applications can be locked in place or made mobile by means of container wheels.

How is an ISO Twistlock secured?

Securing an ISO twistlock is a simple but precise process. When loading containers, the twistlocks are placed on the corners of the shipping container. The mechanism is then rotated 90 degrees, causing the twistlock to grip firmly into the recesses of the container corner. This simple twisting motion securely locks the container and prevents movement during transport. This quick and effective process is essential for the safe transport of goods worldwide.

Are ISO twist locks universal with all containers?

Although ISO twist locks are standardized to ensure global compatibility, there are some exceptions. Some specific container designs may have different corner configurations, requiring the use of customized twist locks. All twistlocks under container castors are standardized based on the 1161 ISO standard. It is therefore important to carefully check the specifications of both the twistlocks and the containers to ensure the correct fit.

Shipping container wheels with ISO twist locks from Interwheel

At Interwheel, we understand the importance of high-quality and reliable twist locks for your transport needs. Our range includes top-quality shipping container wheels with ISO twist locks. The ISO twistlock is manufactured according to strict standards and specifications, which guarantees durability and reliability. If you would like more information about container wheels with ISO twistlocks and their possibilities, please feel free to contact us at [email protected], +31 (0)26 383 5988 or live chat. You can also read our ‘’Container Wheels Guide'', which contains all the information and details you need to maneuver your container effortlessly.