Why is it important to back off one full turn when securing nuts on transparent plastic enclosures?

Backing off one full turn when securing nuts on transparent plastic enclosures is crucial to allow for expansion. Materials, particularly plastics, can expand or contract in response to temperature changes. If nuts are secured too tightly without allowing for this movement, the stress placed on the plastic can lead to cracking or other forms of damage. By leaving a slight gap through backing off the nut, this necessary movement is accommodated, protecting the integrity of the enclosure and ensuring its longevity.

The other answer choices address valid concerns but do not apply to the specific issue at hand. Preventing stripping focuses on the mechanical engagement of threads, which is less relevant when considering the material properties of the plastic enclosure. Proper alignment is important for assembly but does not directly relate to thermal expansion. Ensuring a tighter fit might seem beneficial, but, in the context of non-metallic structures like plastics, it could lead to damage rather than enhanced performance.