Which fastening device typically provides a rotational connection between two items?

A hinge is a fastening device that allows for rotational movement between two connected items. It is commonly used in doors, lids, and other applications where two parts need to pivot relative to each other around a fixed axis. The design of a hinge typically consists of two plates connected by a pin, facilitating movement that permits a range of motion, allowing one item to swing open or closed relative to the other.

In contrast, while nails can join materials, they do not provide rotational movement; they primarily function to hold items securely in position. Gears, although they enable rotational motion between two components, are specifically designed for transmitting torque and motion rather than simply connecting items. An O-ring serves the purpose of sealing and does not provide any rotational connection; it’s primarily used to create a tight seal to prevent the passage of fluids or gases. The distinguishing feature of a hinge is its capability to facilitate rotational function, making it the correct choice in this context.