component
Individual items that are put together to make an assembly or equipment system. For example, components of a hot water supply system are pipes, pumps, motorized valves, filters, and heat exchange coils.
Major components are equipment and its sub-components. Minor components are peripherals and equipment parts.
An asset may arrive as single component, such as a an motor, CPU, or security camera, which might or might not need to be assembled with other assets to form one or more assemblies or systems