What does the crest of a thread refer to?

The crest of a thread refers specifically to the highest point on a thread's profile. In the context of threaded fasteners, understanding the crest is integral to knowing how threads function and interact with one another. When a screw or bolt is made, the threading process creates a helical ridge, and the crest is where this ridge peaks. This definition is crucial as it helps in identifying the effective engagement between mating threads in applications involving fastening and assembly.

Recognizing the crest is also important for applications involving torque specifications and load calculations, as it relates directly to the contact and shear forces developed during tightening. Understanding the concept of the crest allows for better design considerations and ensures proper fit and function of threaded components in machining and manufacturing processes.