Which of the following describes the three principal parts of a bolt?

The three principal parts of a bolt are the Head, Grip, and Threads. The head is the top part of the bolt that is typically designed for driving and controlling the torque applied to the bolt. The grip, also known as the shank, is the smooth cylindrical section of the bolt that is located immediately below the head, and it is the portion of the bolt that provides the basic structural integrity and carries the load across the joint being fastened. The threads are provided on a portion of the bolt and are designed to engage with a nut or a tapped hole to create a secure fastening.

Understanding these parts is essential for correctly selecting and using bolts in mechanical assemblies. Knowing the significance of each part can aid in identifying how to properly install bolts and the type of fastening mechanism required for a specific application. The threads are particularly important because they enable the bolt to be tightened or loosened as needed, ensuring that the connection can be adjusted over time as necessary.