With regards to the American National Screw Thread nomenclature, 'pitch' is the __________.

Correct Answer: Option D — distance between corresponding points on adjacent threads

Pitch is defined as the axial distance between corresponding points on adjacent threads. In American National Screw Thread standards, this measurement is fundamental for determining thread compatibility and fit. It is distinct from the lead, which is the distance a screw advances in one full 360-degree rotation.