What is a hinge pin commonly used for in container construction?

A hinge pin is essential in container construction as it plays a crucial role in connecting the hinge blade to the lug. This connection allows for the hinged door to pivot properly when opening and closing, facilitating ease of access while maintaining structural integrity. The hinge pin ensures that the door functions correctly, which is vital for the overall operation of a shipping container, allowing it to be securely opened and closed as needed.

Other options, while related to container functionality, do not pertain directly to the specific role of the hinge pin. For example, attaching a locking mechanism involves different hardware and is not the function of the hinge pin itself. Similarly, securing the door panels or enhancing the door's seal involves other components and methods. The hinge pin's primary responsibility is purely to provide the pivot point through which the door operates, which is why connecting the hinge blade to the lug is the correct use case.