Intro to Millwright Practice Exam

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True or False: Bolts and screws are classified as internally threaded fasteners.

True
False
Sometimes true
Only for screws

The correct answer is: False

The correct classification of bolts and screws hinges on their threading. Bolts are externally threaded fasteners, designed to be installed through an unthreaded hole and typically secured with a nut, which provides the internal threading. On the other hand, screws are also primarily externally threaded, allowing them to cut into their own corresponding internal threads within a pre-drilled hole or to engage directly into materials without the need for a nut. This fundamental distinction underscores why the statement suggesting that both bolts and screws are classified as internally threaded fasteners is false. Neither bolts nor screws have internal threads; instead, they utilize external threading to fasten materials, making the assertion incorrect. The understanding of this classification is essential in understanding the different applications and mechanisms of fasteners in millwrighting.