If I have a single unassembled commodity that includes certain inserts that can be removed (such as a helix coil that could be pulled out) does that commodity fall under the definition of a “part”?

Any commodity that includes more than one element where one of the elements is intended to be able to be removed, or is capable of being removed, without the destruction or the impairment of the commodity’s design use would take that commodity outside the scope of the “parts” definition. Such a commodity is most likely a “component.”